WO2005008799A1 - Cpp磁気抵抗効果素子及びその製造方法、磁気ヘッド、磁気記憶装置 - Google Patents
Cpp磁気抵抗効果素子及びその製造方法、磁気ヘッド、磁気記憶装置 Download PDFInfo
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- WO2005008799A1 WO2005008799A1 PCT/JP2003/009187 JP0309187W WO2005008799A1 WO 2005008799 A1 WO2005008799 A1 WO 2005008799A1 JP 0309187 W JP0309187 W JP 0309187W WO 2005008799 A1 WO2005008799 A1 WO 2005008799A1
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
- G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
- H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
- H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
- H01F10/123—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys having a L10 crystallographic structure, e.g. [Co,Fe][Pt,Pd] thin films
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F10/324—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer
- H01F10/3268—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
- H01F41/30—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE]
- H01F41/302—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE] for applying spin-exchange-coupled multilayers, e.g. nanostructured superlattices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/01—Manufacture or treatment
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/10—Magnetoresistive devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/80—Constructional details
- H10N50/85—Magnetic active materials
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B2005/3996—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects large or giant magnetoresistive effects [GMR], e.g. as generated in spin-valve [SV] devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
- H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
- H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
- H01F10/14—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys containing iron or nickel
Definitions
- the present invention relates to a magnetoresistive effect element for reproducing information in a magnetic sensor, for example, a magnetic storage device, and more particularly to a CPP (Cu
- the present invention relates to a magnetoresistive element having a structure.
- Conventional spin-valve magnetoresistive elements have a CIP (Curlent In-Plane) structure, that is, a free magnetic layer whose magnetization direction changes according to a magnetic field leaking from a magnetic recording medium. It has a structure in which a sense current flows in the in-plane direction of a spin valve film made of a fixed magnetic layer formed with a magnetic layer interposed therebetween. The scattering of electrons changes according to the angle formed by the free magnetic layer and the fixed magnetic layer, and as a result, the resistance value of the spin valve film changes.
- the total resistance of the variation / spin pulp 'magnetoresistive element resistance change rate resistance in the spin valve magnetoresistive effect element of the CIP structure of about 5%, recording density of about 50 Gb it / in 2 Has been achieved.
- next-generation 100 Gbit / in 2 recording density it is necessary to increase the track density and the linear recording density.
- a spin valve magnetoresistive effect element having a CIP structure if the core width is reduced to increase the track density, the reproduction output decreases in proportion to the core width.
- the spin pulp magnetoresistive effect that constitutes the lead gap is used. It is necessary to reduce the thickness of the insulating film formed above and below the element.However, if the insulating film is reduced in thickness, leakage tends to occur, and a sense current cannot be supplied. Occurs.
- a magnetoresistive effect element having a CPP (Curent Perpendicular to Plane) structure in which a sense current flows perpendicularly to the film surface of the spin valve film can avoid the above-mentioned obstacles in improving the recording density. Therefore, studies are being actively conducted. For a magnetoresistive element with a CPP structure, increasing the rate of change in resistance to improve output is the most important theme.
- CPP Current Perpendicular to Plane
- the magnetoresistance effect element having the CPP structure has a resistance change rate (two ARAZR ATOTAL) of about 1% as shown in FIG.
- RA is the specific resistance multiplied by the film thickness and indicates the resistance value per unit cross-sectional area
- R ATOTAL is the total resistance value of the magnetoresistive element
- AR A is the resistance value of the spin valve film.
- the change is shown.
- the total resistance RA TOTAL is the sum of the resistance of the buffer layer, the antiferromagnetic layer, and the cap layer in addition to the resistance of the spin valve film.
- the antiferromagnetic layer has a specific resistance of 200 ⁇ ⁇ cm.
- the large force 15 nm, makes up 58% of the total resistance R ATOTAL. Since the resistance of the antiferromagnetic layer does not contribute to the change in resistance, it is a so-called parasitic resistance, so the larger the resistance of the antiferromagnetic layer, the lower the resistance change. There is a problem that it.
- Patent Document 1 JP-A-2002-176211 1 Disclosure of efforts
- the present invention provides a novel and useful CPP magnetoresistive element which has solved the above-mentioned problems, a method for manufacturing the same, a magnetic head having a CPP magnetoresistive element, and A general task is to provide a magnetic storage device.
- the present invention relates to a CPP magnetoresistive element, which is capable of improving the rate of change of resistance by reducing the resistance value of the parasitic resistance, and which is suitable for high sensitivity and high density recording, a method of manufacturing the same, and a CPP.
- An object of the present invention is to provide a magnetic head and a magnetic storage device having a magnetoresistive effect element.
- a CPP magnetoresistance effect element including a substrate, and an antiferromagnetic layer, a fixed magnetic layer, a nonmagnetic intermediate layer, and a free magnetic layer, which are sequentially formed on the substrate.
- the ferromagnetic layer is made of an alloy of at least one element selected from the group consisting of Pd, Pt, Ni, Ir, and Rh with Mn, and has a specific resistance of the antiferromagnetic layer at 300 K.
- a CPP magnetoresistive element having a range of 10 ⁇ -cm to: 150 ⁇ ⁇ ⁇ m is provided.
- a sense current flows in the stacking direction through the antiferromagnetic layer, the fixed magnetic layer, the nonmagnetic intermediate layer, and the free magnetic layer formed sequentially on the substrate.
- the antiferromagnetic layer of the structure magnetoresistive element is selected from an alloy of Mn with at least one element selected from the group consisting of Pd, Pt, Ni, Ir, and Rh, and has a specific resistance. Is 10 ⁇ ⁇ . ⁇ 150 ⁇ ⁇ . Set to the range of m.
- the antiferromagnetic layer may have a CuAu-I type ordered lattice crystal structure.
- the resistivity of the antiferromagnetic layer is further improved by improving the regularity of the antiferromagnetic layer and highly uniformly arranging the atoms.
- the CuAu—I type regular lattice has an fct (face-centered square lattice) structure, and as shown in FIG. 2, Mn atoms represented by ⁇ and Pd, Pt, Ni, or I represented by For example, it has a structure in which a lattice point is occupied at the plane center position and occupies the (001) plane, and the other atom similarly occupies the (002) plane.
- the magnetization of the Mn atom has a configuration in which the magnetization of the Mn atom at the face-center position is directed to the anti-TO as shown by the arrow.
- the antiferromagnetic layer is made of an alloy of Mn and at least one element selected from the group consisting of Pd, Pt, Ni, and Ir, and the antiferromagnetic layer has a Mn content of 45 atoms. % 5 may be in the range of 2 atomic 0/0. CuAu— The Mn-based alloy having an I-type ordered lattice has a Mn content of 45 atoms / 0 . The specific resistance can be minimized in the range of up to 52 at%.
- the antiferromagnetic layer is made of Mn R h, R h content may be in the range of 1 to 5 atomic% to 3 0 atoms 0/0. Since the MnRh alloy exhibits low specific resistance in this range, the resistance can be reduced.
- Mn R h alloy has a C u A u- II type ordered lattice composition of Mn 3 R h ie R h content about the composition of the 2 5 atomic% 1 5 atomic% to 3 0 at% 1 h Form an ordered alloy.
- the CuAu—II type regular lattice has an fcc (face-centered cubic lattice) structure. As shown in Fig.
- the atoms forming the binary alloy represented by ⁇ : Mn and Rh: It is configured to occupy the heart position.
- the antiferromagnetic layer is made of MnIr and has an Ir content of 20 atoms / 0 .
- the range may be up to 35 atomic%. Since the MnIr alloy exhibits low specific resistance even in this range, low resistance can be achieved. Since Mn I r alloy to form an ordered alloy composition Mns lr That I r content around the 2 5 atoms 0/0, the resistivity by ordering the atomic arrangement advances are highly uniform I arsenide Is reduced.
- Another antiferromagnetic raw layer is further provided between the antiferromagnetic layer and the fixed magnetic layer.
- the other antiferromagnetic layer is made of the same material as the antiferromagnetic layer, and has a specific resistance.
- the configuration may be such that the specific resistance is higher than the specific resistance of the antiferromagnetic layer.
- a magnetic head including any of the above-described CPP magnetoresistive elements, and a magnetic storage device including the magnetic head and a magnetic recording medium.
- the resistance change rate of any of the above-mentioned CPP magnetoresistive elements is high, it is possible to realize a magnetic head and a magnetic storage device capable of high-sensitivity, high-density recording.
- a method of manufacturing a CPP magnetoresistive element having a substrate and an antiferromagnetic layer, a fixed magnetic layer, a nonmagnetic intermediate layer, and a free magnetic layer sequentially formed on the substrate.
- Forming an antiferromagnetic layer on the substrate A method of manufacturing a CPP magnetoresistive element, comprising an ordering heat treatment step of heating and ordering the antiferromagnetic layer between the step of forming a fixed magnetization layer and the step of forming a fixed magnetization layer.
- an antiferromagnetic layer is formed, and a heat treatment is performed before forming a fixed magnetic layer on the antiferromagnetic layer, so that the atoms constituting the antiferromagnetic layer are made uniform and regular. Therefore, the order of the antiferromagnetic layer is improved, and the specific resistance, which is presumed to be caused by the order, can be reduced.
- the junction consisting of the fixed magnetic layer / non-magnetic intermediate layer / free magnetic layer formed after the ordering heat treatment is not affected by heat due to the ordering heat treatment, it changes according to the applied magnetic field. There is no problem such as deterioration of the resistance change. As a result, the total resistance is reduced and the resistance change is constant, so that the resistance change rate can be improved.
- the method may further include a step of etching the surface of the antiferromagnetic layer between the ordering heat treatment step and the step of forming the fixed magnetic layer.
- the surface of the antiferromagnetic layer may undergo oxidation or other deformation due to the ordered heat treatment, and is activated by etching the surface of the antiferromagnetic layer, thereby improving the crystal coherence with the fixed magnetic layer formed thereon.
- the crystallinity of the initial growth layer of the fixed magnetic layer can be improved.
- the magnetization of the fixed magnetic layer can be sufficiently fixed by the interaction of the antiferromagnetic layer with the fixed magnetic layer.
- another antiferromagnetic layer may be formed on the antiferromagnetic layer using the same material as the antiferromagnetic layer.
- another antiferromagnetic layer of the same material as the antiferromagnetic layer, the crystal matching between the antiferromagnetic layer and the other antiferromagnetic layer and between the other antiferromagnetic layer and the fixed magnetic layer is improved.
- the alternating interaction exerted on the fixed magnetic layer by the antiferromagnetic layer can be further enhanced.
- FIG. 1 is a diagram showing a specific resistance and a resistance change ratio of a conventional magnetoresistive element having a CPP structure.
- FIG. 2 is a diagram showing a crystal structure of a CuAu—I type lattice.
- FIG. 3 is a diagram showing a crystal structure of a CuAu-II type lattice.
- FIG. 4 is a diagram showing the structure of the medium facing surface of the composite magnetic head.
- FIG. 5 is a diagram showing a GMR film constituting the magnetoresistive element according to the first embodiment of the present invention.
- FIG. 6 is a diagram showing characteristics of the Mn-TM alloy and the MnRh alloy.
- FIG. 7 is a diagram showing a temperature change of the specific resistance of the MnPt alloy.
- FIG. 8 is a diagram showing the relationship between the specific resistance of the MnPt alloy at 300 K and the composition of the yarn.
- FIG. 9A and FIG. 9B are diagrams showing the temperature change of the specific resistance of the MnPd alloy.
- FIG. 10 is a diagram showing the relationship between the specific resistance and composition of the MnPd alloy at 300 K.
- FIG. 11A and FIG. 11B are diagrams showing the temperature change of the specific resistance of the MnNi alloy.
- FIG. 12 is a diagram showing the relationship between the specific resistance and the composition of the MnNi alloy at 300 K.
- FIG. 13 is a diagram showing a temperature change of the specific resistance of the MnIr alloy.
- FIG. 14 is a diagram showing the relationship between the specific resistance and composition of the MnIr alloy at 300 K.
- FIG. 4 is a diagram showing a temperature change of a specific resistance of a nearby Mn Rh alloy.
- FIG. 16 is a diagram showing the relationship between the specific resistance and the composition of the MnRh alloy and the MnIr alloy (Rh amount, Ir amount: around 25 atomic%) at 300 K.
- Figure 1 7 is a diagram showing a temperature Heni spoon in the resistivity of the Mn I r alloys near amount I r is 2 to 5 atomic 0/0.
- FIG. 18 to FIG. 18F are diagrams each showing numerically the relationship between the composition and the specific resistance of the Mn-TM alloy and the MnRh alloy at 300 K.
- FIG. 19 is a diagram illustrating a manufacturing process (part 1) of the magnetoresistive element according to the first embodiment.
- FIG. 20 is a diagram illustrating a manufacturing process (part 2) of the magnetoresistive effect element according to the first embodiment.
- FIG. 21 is a diagram illustrating a manufacturing process (part 3) of the magnetoresistive effect element according to the first embodiment.
- FIG. 22 shows a manufacturing process (part 4) of the magnetoresistive effect element according to the first embodiment.
- FIG. 23 is a diagram illustrating a manufacturing process (part 5) of the magnetoresistive effect element according to the first embodiment.
- FIG. 24 is a diagram showing a manufacturing process (part 6) of the magnetoresistive effect element according to the first embodiment.
- FIG. 25 is a diagram illustrating a GMR film included in a magnetoresistive element according to a modification of the first embodiment.
- FIG. 26 is a diagram illustrating a part (part 1) of a manufacturing process of the magnetoresistive element according to the modification of the first embodiment.
- FIG. 27 is a view illustrating a part (part 2) of a manufacturing process of the magnetoresistive element according to the modification of the first embodiment.
- FIG. 28 is a diagram showing a TMR film constituting a magnetoresistive element according to the second embodiment of the present invention.
- FIG. 29 is a cross-sectional view showing a main part of a magnetic storage device according to the third embodiment of the present invention.
- FIG. 30 is a plan view showing a main part of the magnetic storage device shown in FIG.
- FIG. 4 is a diagram showing a structure of a medium facing surface of an inductive recording element and a magnetoresistive element for performing recording and reproduction of a composite magnetic head.
- the rotation direction of the medium is the direction indicated by arrow X.
- head 1 0 to composite magnetism, A 1 2 0 3 of the magnetoresistive element 1 2 is head slider substrate to - T i C (AlTiC) flat Seramitsu click consisting
- the configuration is such that the inductive recording element 11 is formed on a substrate 15 via an alumina film, and these are covered with an insulator such as alumina.
- the composite magnetic head 10 is composed of an inductive recording element 11 for recording located on the downstream side in the rotation direction of the medium and a magnetoresistive element 12 having a CPP type structure located on the upstream side. ing.
- the composite magnetic head 10 transmits information to an opposing magnetic recording medium (not shown) due to a magnetic field leaking between the upper magnetic pole 13 A and the lower magnetic pole 13 B of the inductive recording element 11.
- the leaked magnetic field corresponding to the information recorded and recorded on the magnetic recording medium is detected by the magnetoresistive element 12 as a resistance change.
- the inductive recording element 11 includes an upper magnetic pole 13 A having a width corresponding to the track width of the magnetic recording medium on the medium facing surface, a lower magnetic pole 13 B opposing the recording gap layer 14, and an upper magnetic pole. It consists of a yoke (not shown) for connecting 13 A and the lower magnetic pole 13 B, and a coil (not shown) for winding the yoke.
- the upper magnetic pole 13 A, the lower magnetic pole 13 B, and the yoke are made of a soft magnetic material, and a material having a large saturation magnetic flux density to secure a recording magnetic field, for example, NisFeaK CoZrNb , FeN, FeSiN, FeCo alloy and the like are used.
- the magnetoresistive element 12 includes an alumina film 16 formed on the surface of a ceramic substrate 15 and a lower electrode 18, a GMR film 20, and an upper electrode 21 narrowed by an alumina film 19.
- the magnetic domain control films 22 are formed on both sides of the GMR film 20 via an insulating film 23 having a thickness of about 10 nm or less.
- the sense current for detecting the resistance change is, for example, from the upper electrode 21 through the GMR film 20.
- Magnetic domain control films 22 are arranged on both sides of the GMR film 20.
- the fixed magnetic layer and the free magnetic layer (shown in FIG. 5), which are the soft magnetic layers constituting the GMR film 20, are made into a single magnetic domain to prevent Barkhausen noise. Since the lower electrode 18 and the upper electrode 21 serve not only as a sense current flow path but also as a magnetic shield, they are made of a soft magnetic alloy such as NiFe, CoFe, etc. Be composed.
- FIG. 5 is a diagram showing a GMR film constituting the magnetoresistive element according to the embodiment of the present invention.
- the GMR film 20 has a single spin valve structure, and has an underlayer 25, an antiferromagnetic layer 26, a fixed magnetic layer 28, a nonmagnetic intermediate layer 29, and a free magnetic layer 3. 0, the protective layer 31 is sequentially laminated.
- the underlayer 25 is formed by sputtering or the like on the lower electrode 18 shown in FIG. 4, for example, a 5 nm thick Ta film and a 5 nm thick NiFe film are formed in this order. You.
- the NiFe film preferably has a Fe content in the range of 17 atomic% to 25 atomic%.
- the antiferromagnetic layer 26 formed on the surface of the (111) crystal plane, which is the crystal growth direction of the NiFe film, and the crystal plane equivalent to the crystal plane can be easily grown epitaxially.
- TM at least one of Pt, Pd, Ni, and Ir
- MnRh alloy Be composed.
- These alloys are formed by a sputtering method or the like, and then subjected to a heat treatment at a higher temperature and for a longer time (hereinafter referred to as “ordering heat treatment”), for example, a heat treatment at 800 ° C. for 3 days.
- Anti-ferromagnetism appears due to ordered alloying, and the specific resistance can be significantly reduced. For example, it can be reduced to 150 ⁇ cm or less.
- the antiferromagnetic layer 26 is ordered heat-treated to form the protective layer 31 and then heated at a heat treatment temperature lower than that of the ordered heat treatment (for example, 260 ° C) while applying a magnetic field.
- a heat treatment temperature lower than that of the ordered heat treatment for example, 260 ° C
- the direction of magnetization of the fixed magnetic layer 28 can be fixed by cross interaction with the fixed magnetic layer 28 formed thereon.
- the pinned magnetic layer 28 has a thickness of 1 to 30 nm of Co, Fe, Ni and these elements.
- Soft magnetic ferromagnetic materials including, for example, materials such as Ni 80 Fe 20 and Co 90 Feio can be used. Or, it may be composed of these laminates.
- the magnetization direction of the fixed magnetic layer 28 is fixed by the interaction between the antiferromagnetic layers 26 provided on the base.
- the nonmagnetic intermediate layer 29 is made of a conductive material having a thickness of 1.5 nm to 4. On m formed by a sputtering method, for example. u film and A1 film.
- the free magnetic layer 30 is formed on the surface of the nonmagnetic intermediate layer 29 by a sputtering method or the like, and has a thickness of 1 nm to 30 nm, such as Co, Fe, Ni, or a soft magnetic ferromagnetic material containing these elements. For example, Ni 8 oF e2o, C. 9oF eio, C. Etc. seventh SF e 20 B2, or constituted by a laminate of these films.
- the magnetization of the free magnetic layer 30 is oriented in the in-plane direction, and the direction of the magnetic field changes according to the direction of the magnetic field leaking from the magnetic recording medium.
- the resistance of the stacked body of the fixed magnetic layer 28, the nonmagnetic intermediate layer 29, and the free magnetic layer 30 corresponds to the angle between the magnetization of the free magnetic layer 30 and the magnetization of the fixed magnetic layer 28.
- the protective layer 31 is formed on the surface of the free magnetic layer 30 by a sputtering method or the like, and has a configuration in which, for example, a Ta layer and a Ru layer each having a thickness of about 5 nm or a Cu layer and a Ru layer are sequentially laminated.
- the protective layer 31 has a Cu layer with a thickness of 1 nm to 5 nm.
- the Cu layer prevents the free magnetic layer 30 from being oxidized during the heat treatment of the GMR film 20, and also has a function of forming a magnetic Z non-magnetic interface with the free magnetic layer 30 to improve the rate of change in resistance.
- the Ru layer has a thickness of 5 ⁇ ! -30 nm, and may be a non-magnetic metal such as Au, Al, W or the like. Oxidation of the GMR film 20 during heat treatment of the antiferromagnetic layer can be prevented. Thus, the GMR film is composed of 20 forces.
- MnRh and MnIr The inventor of the present application has found that when the amount of Rh and the amount of Ir are around 25 atomic%, the specific resistance is significantly reduced by the heat treatment conditions described later.
- the Mn-TM alloy has a composition of 50 atoms 0 / oMn- 50 atoms 0 / oTM in equilibrium, and forms a CuAu-I type ordered lattice crystal structure.
- Influence Mn Ir alloy has 75 atoms 0 /. It is known that a composition of Cu Au-II type or the like is formed at the composition of Mn—25 atomic% Rh or Ir. By forming the ordered lattice, it is reduced in the conventional antiferromagnetic layer. An antiferromagnetic layer having a specific resistance value that could not be obtained could be formed.
- FIG. 6 is a diagram showing characteristics of the Mn-TM alloy and the MnRh alloy. The characteristic of each alloy shown in FIGS. 6 to 1 7, polycrystalline Ingotto of each alloy (dimensions 3 mm X 3 m mX 1 Omm ) vacuum sealed in a quartz glass tube (vacuum degree 1 0- 4 P a to 1 0 ⁇ 3 ⁇ a)
- the Mn-TM alloy shows a local minimum value near the composition of 50 atomic% Mn-50 atomic 0 / oTM at a specific resistance of 300 K.
- the minimum value of the specific resistance varies depending on the element of TM, but it can be seen that it is 22 ⁇ ⁇ cm to 60 ⁇ ⁇ cm.
- the specific resistance is remarkably reduced in the composition around 50 atomic% Mn- 50 atomic% TM, it is thought that the specific resistance can be reduced to 10 ⁇ ⁇ cm by strictly selecting the composition.
- MnRh alloy and Mn I r alloys it can be seen that a minimum value in the composition of 75 atomic 0/0 Mn- 25 atomic% Rh or I r. It can be seen that the minimum value of the specific resistance is 58 ⁇ ⁇ cm for the MnRh alloy and 40 ⁇ ⁇ cm for the MnIr alloy.
- the exchange interaction can be stably exerted on the fixed magnetic layer during the actual use.
- the graph of the temperature change of the specific resistance shows the specific resistance when the temperature is increased and decreased, and the arrow indicates the Neel temperature TN of each composition.
- the Neel temperature TN is the temperature at which the temperature differential value of the specific resistance is minimum in the case of CuAu-I type alloy from the temperature change of the specific resistance, and the temperature gradient of the specific resistance of CuAu-II type alloy is Sudden change Temperature.
- FIG. 7 is a diagram showing a temperature change of the specific resistance of the MnPt alloy.
- FIG. 8 is a diagram showing the relationship between the specific resistance and composition of the MnPt alloy at 300 K. 7 and 8, the Pt content of the MnPt alloy was varied from 40.7 atomic% to 56.1 atomic%.
- a polycrystalline ingot was prepared and subjected to the above ordered heat treatment. is there.
- the specific resistance of the MnPt alloy shows a minimum value of 22 ⁇ ⁇ cm, which is considerably lower than that of the conventional antiferromagnetic layer of 200 ⁇ cm. You can see that it has been done. Even if the temperature of the ordered heat-treated MnPt alloy is raised to 1100K, the graphs of the resistivity at the time of temperature decrease and the graph at the time of temperature rise overlap. That is, it can be seen that the thermal stability is excellent. Therefore, it can be seen that the low specific resistance characteristics do not change even if the heat treatment in a magnetic field of about 265 ° C (538K) is performed after the ordered heat treatment.
- the composition range in which the specific resistance of the MnPt alloy at 300K is 150 / ⁇ ⁇ cm or less is that the Pt content is 46.7 atomic% to 56.4 atomic%. It can be seen that the composition range where ⁇ ⁇ cm or less is 48.7 atomic% to 52.2 atomic%.
- FIG. 9A and FIG. 9B are diagrams showing the temperature change of the specific resistance of the MnPd alloy.
- FIG. 10 is a diagram showing the relationship between the specific resistance and composition of the MnPd alloy at 300K. 9A, 9B, and 10, a polycrystalline ingot having a composition varied from 46.7 atomic% to 58.9 atomic% in the Pd content of the MnPd alloy was prepared and subjected to the above-described ordered heat treatment. It is what went.
- the specific resistance of the MnPd alloy at 300 K is 46.7 atoms with the Pd content, which is the composition in the range of execution. /.
- the total value is 150 ⁇ ⁇ cm or less, and can be reduced to 150 ⁇ ⁇ cm or less even if the amount of Pd is reduced or increased.
- the composition range below 75 ⁇ ⁇ c ⁇ is 4 9. 2 atoms 0 /. It can be seen that - 58. a 4 atom 0/0.
- FIG. 11A and FIG. 11B are diagrams showing the temperature change of the specific resistance of the MnNi alloy.
- FIG. 12 is a diagram showing the relationship between the specific resistance and composition of the MnNi alloy at 300 K.
- the Ni content of the MnNi alloy was 3.3 atoms / 0 . ⁇ 54.5 atoms. /.
- a polycrystalline ingot having a composition varied in the range of 1) was prepared and subjected to the above-described ordered heat treatment.
- the specific resistance of the MnNi alloy at 300 K is in the range of the composition where the Ni content is 43.3 atomic% to 54.5 atomic 0 /. In this range, the total value is 150 ⁇ 1cm or less, and even if the amount of Ni is further reduced or increased, it can be 150 ⁇ cm or less.
- the composition range of 75 ⁇ ⁇ cm or less is 46.9 atoms 0 /. It can be seen that - 53. a 7 atom 0/0.
- FIG. 13 is a diagram showing a temperature change of the specific resistance of the MnIr alloy.
- FIG. 14 is a diagram showing the relationship between the specific resistance and composition of the MnIr alloy at 300K. 1 3 and in FIG. 14, M n I r I r quantity 40.2 atomic percent to 51.8 atomic 0/0 prepared by the ordering heat treatment of polycrystalline Ingotto the composition was modified in a range of alloy Is performed. Referring to FIG. 13, it can be seen that the specific resistance of the MnIr alloy that has been subjected to the above-described ordered heat treatment is considerably reduced similarly to the above-described MnPt alloy. In addition, since the graphs of the specific resistance values at the temperature rise and fall of 300 K: to 1100 K overlap, it is understood that the alloy has the same thermal stability as the MnPt alloy.
- the specific resistance of the Mnlr alloy at 300 K is 40.2 atoms / 0, which is the composition in the range of the embodiment. ⁇ 51.8 atoms / 0 . It can be seen that the total value is below 150 ⁇ ⁇ cm within the range of, even if the amount of Ir is further reduced or increased, it is also below 150 ⁇ ⁇ cm.
- the composition range of less than 75 ⁇ ⁇ ⁇ cm is 4 6. is 5 atomic 0/0 above, be equal to or less than even 75 ⁇ ⁇ ⁇ cm increases from 51.8 atomic 0/0 was carried I understand.
- FIG. 15 is a diagram showing the temperature change of the specific resistance of the MnRh alloy. FIG.
- FIGS. 15 and 16 are diagram showing the relationship between the specific resistance and the composition of the MnRh alloy at 300 K (the MnIr alloy is also shown).
- the amount of Rl ⁇ l of the MnRh alloy was set to 17 atoms / 0 .
- a polycrystalline ingot having a composition varied in the range of up to 30 atomic% was prepared and subjected to the above-mentioned ordered heat treatment.
- the specific resistance of the MnRh alloy at 30 OK is a composition within the range of the implementation, and the Rh content is 17 atoms / 0 .
- the Rh content is 17 atoms / 0 .
- To 30 atomic 0/0 decreased from a further amount of Rh becomes less all 150 ⁇ ⁇ cm 1 7 atomic% in the range of, or 30 atoms. /. It can be sufficiently predicted that even if the calorie is increased, it can be reduced to 150 ⁇ ⁇ cm or less.
- Figure 17 is a diagram showing the temperature change of the specific resistance of the MnIr alloy when the Ir content is around 25 atomic%.
- Fig. 16 shows the relationship between the specific resistance and composition of the MnIr alloy at 30 OK. In FIGS.
- the specific resistance of the MnIr alloy at 300 K is 75 / ⁇ ⁇ cm or less with the Ir content of 25 at.% And 30 at. Reduced the Ir content from 25 atomic% to 20 atoms. It can be sufficiently predicted that the resistivity can be reduced to 75 ⁇ ⁇ cm or less or 15 ⁇ ⁇ cm or less even if it is increased from / 0 or 30 atomic% to 35 atomic%.
- a polycrystalline ingot of each of the Mn-TM alloy and the MnRh alloy that has been subjected to ordered heat treatment has a low specific resistance and its thermal stability.
- 18A to 18F show the Mn- It shows the relationship between the composition and specific resistance of TM alloy and MnRh alloy by numerical values.
- a method of manufacturing a CPP magnetoresistance effect element according to the present embodiment, in which ordered heat treatment is applied using these Mn-TM alloy and MnRh alloy as antiferromagnetic layers, will be described.
- FIG. 19 to FIG. 24 are views showing the steps of manufacturing the magnetoresistive element according to the present embodiment.
- the magnetoresistive element is manufactured by a method substantially similar to that of the previous process of the semiconductor integrated device.
- Vacuum tank used to form and heat treatment of each layer, using as it can base pressure is in a high vacuum from 1 X 10- 8 P a, as the vacuum exhaust device, a high vacuum mosquito ⁇ Tsu cleaning such as a turbo pump Use a material that can maintain a natural atmosphere.
- the substrate temperature during film formation is set to room temperature unless otherwise specified.
- an alumina film 16 is formed on an Altic ceramic substrate 15 by a sputtering method or the like, and a lower electrode 18 made of a NiFe film is formed by a sputtering method or a plating method.
- an underlayer 25 in which a Ta film (thickness: 5 nm) and a NiFe film (thickness: 5 nm) are sequentially stacked is formed on the lower electrode by sputtering or the like.
- the underlayer 25 is not limited to these materials, but from the viewpoint of controlling the crystal growth direction of the antiferromagnetic layer formed thereon, the upper layer of the underlayer 25 is N i F e membranes are preferred.
- An antiferromagnetic layer 33 having the above-described composition of the h alloy is formed with a thickness of 5 nm to 30 nm (preferably, 10 nm to 20 nm). In the film-formed state, the arrangement of the atoms constituting each alloy is not regular, and no antiferromagnetism has appeared.
- a regularizing heat treatment of the structure of FIG. 19 is performed.
- the substrate on which the structure shown in Fig. 19 is formed is transported to the heat treatment emptying tank while maintaining a high vacuum from the vacuum chamber where the film was formed, and the furnace, RTP (Rapid Therapy) r ma 1 Process).
- RTP Rapid Therapy
- Heat treatment ® Use an empty tank that can maintain a high vacuum equivalent to the vacuum tank for film formation. Note that regular heat treatment may be performed in a vacuum chamber in which film formation is performed.
- the ordering heat treatment is performed at a degree of vacuum of 10-5 Pa to 10 Pa and a heating temperature of 400.
- C-800. C the treatment time is set to 24 hours to 240 hours, for example, at a degree of vacuum of 10-5 Pa, for example, at 800 ° C (1073K :) for 72 hours.
- the heating rate was, for example, 5 ° C / min, and the cooling rate was natural cooling in a vacuum chamber. (The cooling rate depends on the temperature, but the cooling time is 8 hours.)
- the ordered heat treatment may be performed in the absence of a magnetic field, or a magnetic field (same in size and direction) may be applied in a magnetic field heat treatment performed in a later step.
- the arrangement of the atoms constituting the antiferromagnetic layer 33 is changed to a shell-like IJ and the atoms are more uniformly distributed, so that a higher regularity is obtained.
- the film is converted from a film-formed state into an ordered antiferromagnetic layer 26 having the above-described specific resistance.
- the wafer is further transferred to a vacuum chamber in which a film is formed while maintaining a high vacuum, and the surface of the antiferromagnetic layer 26 is dry-etched to activate the outermost surface.
- the outermost surface of the antiferromagnetic layer 26 is slightly oxidized or the like by the above-described shell IJ heat treatment, thereby preventing the interaction between the antiferromagnetic layer 26 and the fixed magnetic layer formed thereon from being hindered.
- dry etching causes Ar ions, Xe ions, and the like to be incident on the surface of the antiferromagnetic layer 26 to remove one to several atomic layers.
- the incident energy of these ions is preferably, for example, in the range of 50 eV to 300 eV. Damage to the antiferromagnetic layer 26 can be reduced.
- dry etching may be performed in a vacuum chamber dedicated to dry etching. Further, dry etching need not be performed.
- the fixed magnetic layer 28 (CogoFeioH (thickness: 3.0 nm)) and the non-magnetic intermediate layer 29 (Cti) are formed on the activated antiferromagnetic layer 26 by using the Spack method or the like.
- a heat treatment in a magnetic field is performed to set the direction of the uniaxial anisotropy of the antiferromagnetic layer 26, that is, the direction of the magnetization of the fixed magnetic layer.
- the magnitude of the magnetic field is set in the range of 10 kOe to 20 kOe and the temperature in the range of 250 ° C to 300 ° C in a predetermined direction. Perform for 10 hours.
- the GMR film 20 of the structure of FIG. 21 is ground to a desired width (corresponding to the width of the reproduction track). Specifically, the resist film is patterned and ground by dry etching until the lower electrode 18 is reached.
- the surface is further covered with an insulating film 23 made of an alumina film on both sides of the GMR film 20 and the surface of the lower electrode 18, and then a magnetic domain control film made of, for example, CoCrPt Form 2 2 Specifically, an opening is formed in a portion where the magnetic domain control film 22 is formed by patterning a resist, and a film is formed by a sputtering method or the like. At this time, an insulating layer 23 such as an alumina film is provided at the interface between the magnetic domain control film 22 and the GMR film 20.
- etching is performed to leave the alumina film 19 above the GMR film 20 thick.
- a resist film 34 is formed on the alumina film 19, and patterning is performed to form an opening 34-1 above the GMR film 20.
- grinding is performed by RIE (reactive ion etching) until the GMR film 20 is exposed through the opening 34-1 of the resist film 34.
- the resist film 34 of FIG. 23 is removed, and an upper electrode 21 made of, for example, a NiFe film is formed by plating / sputtering.
- an upper electrode 21 made of, for example, a NiFe film is formed by plating / sputtering.
- the magnetoresistive effect element 12 is formed with the force S.
- the inductive recording element 11 is formed on the structure shown in FIG. 24 by a known method.
- a heat treatment protective layer made of, for example, Ta may be provided on the surface of the antiferromagnetic layer 26. Oxidation on the surface of the antiferromagnetic layer 26 can be prevented, and the heat treatment vacuum chamber can be operated at a relatively low vacuum level. Therefore, the cost of equipment for the ordered heat treatment can be reduced.
- the protective layer for heat treatment is removed by dry etching using an etching gas such as SF 6 or CF 4 .
- the ordered heating treatment is performed before the formation of the antiferromagnetic layer 33 and the formation of the fixed magnetic layer 28, whereby the ordered and low-resistance antiferromagnetic layer 26 is formed.
- This modification has the same configuration as that of the first embodiment except that a thin second antiferromagnetic layer is provided on the surface of the antiferromagnetic layer 26 of the GMR film 20.
- FIG. 25 is a diagram showing a GMR film constituting a magnetoresistive element according to a modification of the first embodiment.
- parts corresponding to the parts described above are denoted by the same reference numerals, and description thereof will be omitted.
- the GMR film 40 has a single spin valve structure, and has an underlayer 25, a first antiferromagnetic layer 26, a second antiferromagnetic layer 41, a fixed magnetic layer 28, and a nonmagnetic intermediate layer 29.
- the free magnetic layer 30 and the protective layer 31 are sequentially laminated.
- the antiferromagnetic layer 26 in the first embodiment is referred to as a first antiferromagnetic layer 26.
- the second antiferromagnetic layer 41 is formed on the first antiferromagnetic layer 26, and 1 n n! It is composed of a material having the same composition as the first antiferromagnetic layer 26 of up to 5 nm.
- 26 and 27 are views showing a part of the manufacturing process of the magnetoresistive element according to the present modification.
- the surface of the first antiferromagnetic layer 26 which has been etched and becomes active is formed by sputtering using the same material as the first antiferromagnetic layer 26 by 1 nm to 5 nm.
- the second antiferromagnetic layer 41 is formed. Since the second antiferromagnetic layer 41 can be epitaxially grown on the first antiferromagnetic layer 26, the crystal of the second antiferromagnetic layer 41 Thus, the interaction with the fixed magnetic layer 28 formed thereon can be improved.
- the layers from the fixed magnetic layer 28 to the protective layer 31 are formed on the second antiferromagnetic layer 41, as in the first embodiment.
- a calo-heat treatment in a magnetic field is performed to cause the antiferromagnetism of the second antiferromagnetic layer 41 to appear, and the direction of the uniaxial anisotropy of the first and second antiferromagnetic layers 26, 41 That is, the direction of magnetization of the fixed magnetic layer 28 fixed by the first and second antiferromagnetic layers [4, 26, 41] is set, and the magnetization direction of the fixed magnetic layer 28 is set. Is fixed. Specifically, the magnetic field is set in a predetermined direction within a range of 10 kOe to 20 kOe and a temperature of 250 ° C to 300 ° C for 10 hours. Further, the steps of FIGS. 22 to 24 are performed to form a magnetoresistive element according to this modification.
- the second antiferromagnetic layer 41 having the same composition on the etched first antiferromagnetic layer 26, the first antiferromagnetic layer 26 and the second antiferromagnetic layer are formed. 41.
- the crystal matching between the second antiferromagnetic layer 41 and the fixed magnetic layer 28 is improved, and the exchange interaction of the first and second antiferromagnetic layers 26 and 41 with the fixed magnetic layer 28 is increased.
- the fixed magnetic layer 28 may have a laminated ferrimagnetic structure.
- the fixed ferromagnetic layer of the laminated ferrimagnetic structure has a configuration in which a lower ferromagnetic layer, a nonmagnetic coupling layer, and an upper ferromagnetic layer are sequentially stacked. More specifically, the lower and upper ferromagnetic layers have the same composition of the magnetic material, and the same soft magnetic material as the fixed magnetic layer having a thickness of 1 to 30 nm can be used.
- the non-magnetic coupling layer is selected, for example, from a thickness of 0.4 nm to 2. Onm (preferably 0.6 nm to 1. Onm), and is made of, for example, Ru, Cr, a Ru alloy, or a Cr alloy.
- the lower ferromagnetic film has its magnetization direction fixed by the antiferromagnetic layer 26 provided on the lower side, and the lower ferromagnetic film is opposite to the upper ferromagnetic film. Due to the ferromagnetic coupling, the magnetization of the upper ferromagnetic film is fixed to the magnetization of the lower ferromagnetic film.
- the fixed magnetic layer With a laminated ferrimagnetic structure, the fixed magnetic layer The net magnetization can be reduced, and the influence of the magnetization of the fixed magnetic layer on the free magnetic layer can be reduced. As a result, the magnetization of the free magnetic layer can more accurately respond to the magnetization from the outside, for example, from a magnetic recording medium, and the reproduction sensitivity can be improved.
- a magnetoresistive effect element having a CPP type structure according to the second embodiment of the present invention is a ferromagnetic tunnel junction magnetoresistive (TMR) instead of the GMR film of the first embodiment.
- TMR tunnel junction magnetoresistive
- a film is used.
- an insulating non-magnetic intermediate layer is used in place of the conductive non-magnetic intermediate layer of the GMR film of the first embodiment.
- the insulating non-magnetic intermediate layer is called a non-magnetic insulating layer.
- FIG. 28 is a diagram illustrating a TMR film included in the magnetoresistive element according to the second embodiment. Note that the same reference numerals are given to portions corresponding to the portions described above, and description thereof will be omitted.
- the configuration of the TMR film is substantially the same as that of the GMR film shown in FIG. 5, and includes the underlayer 25, the antiferromagnetic layer 26, the fixed magnetic layer 28, and the nonmagnetic insulating layer 5. 1, a free magnetic layer 30 and a protective layer 31 are sequentially laminated.
- the non-magnetic insulating layer 51 is formed by, for example, a sputtering method, and is made of an alumina film, an aluminum nitride film, a tantalum oxide film, or the like having a thickness of 0.5 nm to 1.5 nm. These materials may be directly deposited, a metal film such as an aluminum film may be formed, and then converted using a natural oxidation, a plasma oxidation, a radical oxidation method, or a nitridation method thereof. .
- the antiferromagnetic layer 26 is composed of the antiferromagnetic layer of the first embodiment, or a stacked body of the first and second antiferromagnetic layers which are modifications thereof. Therefore, the specific resistance is reduced as described above, and as a result, the resistance value is reduced.
- the TMR film 50 has a high resistance value at the ferromagnetic tunnel junction composed of the fixed magnetic layer 28 / the nonmagnetic insulating layer 51 / the free magnetic layer 30. Although the ratio occupied by this value is smaller than that of the GMR film, the resistance of the antiferromagnetic layer 26 is parasitic resistance The resistance change rate of the TMR film 50 can be improved by reducing the specific resistance of the antiferromagnetic layer 26, and the magnetic resistance effect suitable for high sensitivity and high density recording can be achieved. An element can be realized. (Third embodiment)
- FIG. 29 is a cross-sectional view showing a main part of the magnetic storage device.
- FIG. 30 is a plan view showing a main part of the magnetic storage device shown in FIG.
- the magnetic storage device 60 generally includes a housing 63.
- a motor 64 In the housing 63, there are a motor 64, a hub 65, a plurality of magnetic recording media 66, a plurality of composite magnetic heads 67, a plurality of suspensions 68, a plurality of arms 69, and an actuator.
- Tunits 61 are provided.
- the magnetic recording medium 66 is attached to a hub 65 rotated by a motor 64.
- the composite magnetic head 67 includes an inductive recording element 67A and a magnetoresistive element 67B (not shown because of their small size). Each composite magnetic head 67 is attached to the tip of the corresponding arm 69 via a suspension 68.
- the arm 69 is driven by the actuator unit 61.
- This embodiment of the magnetic storage device 60 is characterized by a magnetoresistive element 67B.
- the magnetoresistive elements 67B the magnetoresistive elements of the first embodiment, its modifications, and the second embodiment are used.
- a magnetoresistance effect element has a high resistance change ratio, that is, a high magnetic field detection sensitivity. Therefore, even if the magnetic field leaking from the magnetic field of one magnetic reversal corresponding to one bit of information is very small, it can be read, and is suitable for high-density recording.
- the laminated ferrimagnetic structure may be provided in the free magnetic layer. And the free magnetic layer.
- the hard disk device has been described as an example of the magnetic storage device, but the present invention is not limited to the hard disk device.
- the present invention is used for a magnetic tape device, for example, a magnetic head used in a helical scan type video tape device, and a magnetic tape for a computer in which a number of tracks are formed in the width direction of the magnetic tape. It can be applied to a composite magnetic head.
- the resistance value of the parasitic resistance is reduced, the resistance change rate is improved, and the CPP magnetic resistance suitable for high sensitivity and high density recording is obtained.
- An anti-effect element and a method for manufacturing the same, and a magnetic head and a magnetic storage device including a CPP magnetoresistive element can be mentioned.
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Description
Claims
Priority Applications (4)
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JP2005504379A JPWO2005008799A1 (ja) | 2003-07-18 | 2003-07-18 | Cpp磁気抵抗効果素子及びその製造方法、磁気ヘッド、磁気記憶装置 |
PCT/JP2003/009187 WO2005008799A1 (ja) | 2003-07-18 | 2003-07-18 | Cpp磁気抵抗効果素子及びその製造方法、磁気ヘッド、磁気記憶装置 |
EP03741504A EP1648039A4 (en) | 2003-07-18 | 2003-07-18 | CCP MAGNETO-RESISTANT ELEMENT, METHOD FOR THE PRODUCTION THEREOF, MAGNETIC HEAD AND MAGNETIC STORAGE |
US11/334,150 US20060157810A1 (en) | 2003-07-18 | 2006-01-17 | CPP magneto-resistive element, method of manufacturing CPP magneto-resistive element, magnetic head, and magnetic memory apparatus |
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PCT/JP2003/009187 WO2005008799A1 (ja) | 2003-07-18 | 2003-07-18 | Cpp磁気抵抗効果素子及びその製造方法、磁気ヘッド、磁気記憶装置 |
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US11/334,150 Continuation US20060157810A1 (en) | 2003-07-18 | 2006-01-17 | CPP magneto-resistive element, method of manufacturing CPP magneto-resistive element, magnetic head, and magnetic memory apparatus |
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US (1) | US20060157810A1 (ja) |
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JP2005333106A (ja) * | 2004-04-20 | 2005-12-02 | Ken Takahashi | 交換結合素子とその製造方法並びに交換結合素子を具備したデバイス |
EP1688923A3 (en) * | 2005-02-01 | 2007-11-07 | Hitachi Global Storage Technologies Netherlands B.V. | Method for increasing the coupling strength of a sensor and sensor for a reading head |
JP2008010509A (ja) * | 2006-06-27 | 2008-01-17 | Fujitsu Ltd | 磁気抵抗効果素子及び磁気ディスク装置 |
WO2008152915A1 (ja) * | 2007-06-11 | 2008-12-18 | Ulvac, Inc. | 磁気デバイスの製造方法、磁気デバイスの製造装置、及び磁気デバイス |
JP2009164268A (ja) * | 2007-12-28 | 2009-07-23 | Fujitsu Ltd | 交換結合素子および磁気抵抗効果素子 |
WO2010050125A1 (ja) * | 2008-10-31 | 2010-05-06 | 株式会社日立製作所 | Cpp-gmr素子、tmr素子および磁気記録再生装置 |
JP2013191268A (ja) * | 2012-03-14 | 2013-09-26 | Seagate Technology Llc | センサスタックの製造方法、読み取りヘッド、およびセンサスタック |
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CN101652671A (zh) * | 2007-03-30 | 2010-02-17 | Nxp股份有限公司 | 磁阻传感器 |
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JP2005333106A (ja) * | 2004-04-20 | 2005-12-02 | Ken Takahashi | 交換結合素子とその製造方法並びに交換結合素子を具備したデバイス |
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US7408747B2 (en) | 2005-02-01 | 2008-08-05 | Hitachi Global Storage Technologies Netherlands B.V. | Enhanced anti-parallel-pinned sensor using thin ruthenium spacer and high magnetic field annealing |
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JPWO2008152915A1 (ja) * | 2007-06-11 | 2010-08-26 | 株式会社アルバック | 磁気デバイスの製造方法、磁気デバイスの製造装置、及び磁気デバイス |
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JP2009164268A (ja) * | 2007-12-28 | 2009-07-23 | Fujitsu Ltd | 交換結合素子および磁気抵抗効果素子 |
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US11125836B2 (en) | 2012-03-14 | 2021-09-21 | Seagate Technology Llc | Magnetic sensor manufacturing |
Also Published As
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EP1648039A4 (en) | 2006-09-06 |
US20060157810A1 (en) | 2006-07-20 |
JPWO2005008799A1 (ja) | 2006-09-07 |
EP1648039A1 (en) | 2006-04-19 |
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