WO2005086250A1 - トンネルジャンクション素子 - Google Patents
トンネルジャンクション素子 Download PDFInfo
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- WO2005086250A1 WO2005086250A1 PCT/JP2005/003099 JP2005003099W WO2005086250A1 WO 2005086250 A1 WO2005086250 A1 WO 2005086250A1 JP 2005003099 W JP2005003099 W JP 2005003099W WO 2005086250 A1 WO2005086250 A1 WO 2005086250A1
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- Prior art keywords
- tunnel junction
- ferromagnetic
- electrode
- oxygen deficiency
- electrodes
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Classifications
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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
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3909—Arrangements using a magnetic tunnel junction
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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
-
- 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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- 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
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/40—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials of magnetic semiconductor materials, e.g. CdCr2S4
- H01F1/401—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials of magnetic semiconductor materials, e.g. CdCr2S4 diluted
- H01F1/407—Diluted non-magnetic ions in a magnetic cation-sublattice, e.g. perovskites, La1-x(Ba,Sr)xMnO3
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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
- H01F10/3254—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the spacer being semiconducting or insulating, e.g. for spin tunnel junction [STJ]
-
- 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
- H01F41/20—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 by evaporation
- H01F41/205—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 by evaporation by laser ablation, e.g. pulsed laser deposition [PLD]
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/11—Magnetic recording head
- Y10T428/1107—Magnetoresistive
- Y10T428/1114—Magnetoresistive having tunnel junction effect
Definitions
- the present invention relates to a tunnel junction element, and is used for a magnetic head necessary for reading out information stored by magnetism. Furthermore, this technology can be applied to technology related to TMR (tunnel magnetoresistive) devices, which will be applied to magnetic memory devices.
- TMR tunnel magnetoresistive
- a node disk drive (HDD) that uses magnetic recording has the features of large capacity, non-volatility, and low cost, and is at the core of storage devices.
- applications to AV devices such as video recorders and car navigation systems have been expanding by using PCs, and the field is expanding.
- Such a field demands endless miniaturization of the memory size.
- a memory capacity of 100 Gbpsi can be achieved with a magnetic material size of 30 nm (300 A) in 2004, and a memory capacity of 100 Gbpsi can be achieved with a magnetic material size of about 10 nm (100 A) in 2010! /
- the TMR element can be applied not only as a magnetic sensor but also as a magnetic memory.
- IBM has already announced its joint development plan to bring 256Mbit-MRAM to the market in 2004, and it is beginning to take on even more importance.
- Patent document 1 Japanese Patent Application Laid-Open No. 2000-11330
- Non-Patent Document 1 Ohashi et al, NEC Low Resistance Tunnel Magnetoresistive Head ", IEEE Transaction on Magnetics, Vol. 36, No. 5, pp. 254 9-2553, 2000
- Non-Patent Document 2 M. Bowen et al. Appl. Phys. 82 (2003) 233
- Non-Patent Document 3 M. Kawasaki, Y. Tokura et al, Jpn.J. Appl. Phys. Vol. 42 (
- a TMR element is an element that utilizes a spin-polarized tunnel magnetoresistance effect in a ferromagnetic (including ferrimagnetic) tunnel junction (junction).
- Ferromagnetic (including ferrimagnetic) tunnel junctions have a sandwich structure in which a transition metal such as iron is used as a ferromagnetic (including ferrimagnetic) metal layer and a sufficiently thin insulator film such as A1O is sandwiched between them. are doing.
- the basic physical phenomenon is based on the fact that the spin direction of the upper and lower ferromagnetic (including ferrimagnetic) layers changes the probability that conduction electrons can tunnel through the insulating layer barrier. It has been shown that when a ferromagnetic (including ferrimagnetic) metal layer that constitutes a TMR element is made of a Besquitite-type oxide, an even higher MR ratio can be obtained than when a normal transition metal is used. (Non-Patent Document 2 above). The MR ratio of this device actually exceeds 1800% at 4K. Such a TMR element is called a CMR (colossal magnetoresistive) element.
- an object of the present invention is to provide an element that can control the spin holding force even at room temperature.
- the magnetic field starts from a sufficiently strong magnetic field in which the external magnetic field is to the left (the magnetic field is in the negative direction) and the spins of the upper and lower ferromagnetic electrodes are to the left [state (1)].
- the external magnetic field is reduced, crosses zero, and is applied to the rightward magnetic field, the spin of the lower ferromagnetic electrode reverses to the right with a low external magnetic field of Hcl.
- the external magnetic field strength of He 1 is defined as the strength of the spin holding power of the lower ferromagnetic electrode. If this Hcl is small, the spin direction can be reversed with a small magnetic field.
- the spin coercive force of the upper ferromagnetic electrode is Hc2
- Hc2> H> Hcl [state (2)] the spin of the lower ferromagnetic electrode turns right, but the upper ferromagnetic electrode Keep left, facing left.
- the resistance value of the TMR element in the spin state (2) is larger than that in the state (1).
- the external magnetic field strength to the right increases and H> Hc2 (state (3))
- the spin directions of the upper ferromagnetic electrode are reversed to the right, and the upper and lower spin directions become parallel, and the resistance of the element becomes higher. Becomes smaller.
- FIG. 2 shows the resistance change at this time.
- FIG. 3 shows the relationship between the TMR element and the storage medium.
- the TMR element is located close to the storage medium and reads the stray magnetic field generated from the spin domain embedded in the storage medium. This leakage magnetic field is read as the external magnetic field to the TMR element, and the change in the external magnetic field is read as the change in resistance.
- the 0, 1 information embedded in the storage medium is read as a resistance change between both electrodes of the TMR element.
- the change of the external magnetic field corresponding to the data to 01 is read.
- Hc2 when the difference between the values of Hc2 and Hcl is small, that is, when the difference between the holding forces of the upper and lower ferromagnetic electrodes is small, a variation in the resistance value occurs, and the device does not operate. If Hc2 is too large, the sensitivity to an external magnetic field decreases. In this case, the strength of the magnetization of the storage medium material and the distance of the storage medium force determine the leakage magnetic field at one position of the sensor.Therefore, it should be solved that the appropriate Hc2 can be selected and controlled under these conditions. It is an indispensable task.
- the magnetic field strength of the spin domain that stores information differs depending on the constituent material, and the domain force felt by the sensor and the stray magnetic field strength strongly depend on the arrangement relationship between the spin domain and the sensor. Therefore, controlling the holding power of the two electrodes is a very important task in practical use.
- the difference in holding force between the two electrodes is not so large as to be practical.
- it largely depends on the external environment (stress such as the manufacturing process and the protective film of the element), which causes the instability of the resistance characteristic of the magnetic sensor element, which is a major problem to be solved.
- the inventors of the present application have developed a belovskite-type ferromagnetic (including ferrimagnetic) conductive oxide composed of a plurality of transition metal elements, each having a different composition.
- a belovskite-type ferromagnetic (including ferrimagnetic) conductive oxide composed of a plurality of transition metal elements each having a different composition.
- materials (Claim 1).
- one electrode is a perovskite-type ferromagnetic (including ferrimagnetic) conductive oxide composed of a Mn transition metal element
- the other electrode is a perovskite-type ferromagnet (contained of a Mn and Ru transition metal element). It may be a conductive oxide (including ferrimagnetism)! (Claim 2).
- the ferromagnetic (including ferrimagnetic) conductive solid material of one of the two electrodes that make up the device is La Sr MnO
- An element having a structure composed of electrodes with y ⁇ x and ⁇ being the amount of oxygen deficiency) and an electrical insulating layer sandwiched between these electrodes may be used (claim 3).
- the electrode constituting the element is La Sr
- This electrode is made of a ferromagnetic (including ferrimagnetic) conductive solid material that uses La Sr MnO-type oxide (0.2 ⁇ x ⁇ 0.5) through an electrical insulating layer.
- ⁇ is oxygen
- the electrically insulating layer is made of ABMM 'O-type oxide (0 ⁇ ⁇ 1, 0 ⁇ 7 ⁇ 1,
- ⁇ is the amount of oxygen deficiency
- ⁇ is an alkaline earth element such as Ca, Sr, Ba or a rare earth element such as La
- B is an alkali other than A such as Ca, Sr, Ba etc.
- Earth element or rare earth element such as La, element composed of Y, Bi, Pb, transition metal element such as Mn, Fe, Co, Ni, Cu as M, Mn other than M as M ', Fe, Co, Ni, It is an element that is an electrical insulating layer using a transition metal element such as Cu (Claim 5). Further, the electric insulating layer may be an element made of SrTiO ( ⁇ is the amount of oxygen deficiency) (claim 6).
- the electrical insulating layer may be an element having LaAlO ( ⁇ is the amount of oxygen deficiency) (claim 7).
- the device according to any one of the above, wherein at least one of the ferromagnetic (including ferrimagnetic) conductive solid material constituting an electrode and a solid material constituting an electrically insulating layer sandwiched between these electrodes. May be a device manufactured by a pulsed laser deposition method (claim 8). In the device manufactured by the pulsed laser deposition method, a solid material of La Sr Mn Ru O type oxide (0.2 ⁇ x ⁇ 0.5, 0 ⁇ y ⁇ x, ⁇ is oxygen deficiency)
- the La Sr Mn Ru O-type oxide (0.2 ⁇ x ⁇ 0.5, 0 ⁇ y ⁇ x, ⁇ is oxygen
- La Sr Mn Ru O type oxidized product (0.2 ⁇ x ⁇ 0.5, 0 ⁇ y ⁇ x, ⁇ is an acid
- the substrate temperature is from 750 ° C to 900 ° C and the oxygen atmosphere pressure is 133mPa (lmTorr).
- These devices were manufactured under the manufacturing conditions of 13.3 Pa (1 OOmTorr) (Claim 10).
- FIG. 1 is an explanatory diagram of magnetic characteristics of a tunnel junction element and upper and lower ferromagnetic electrodes.
- FIG. 2 is an external magnetic field response characteristic of a resistance of a tunnel junction element.
- FIG. 3 is a diagram showing a relationship between a tunnel junction element and a storage medium.
- FIG. 4 is a diagram comparing the structures of a tunnel junction element that is useful in the present invention and a conventional tunnel junction element.
- FIG. 5 is a schematic view of a structure of a tunnel junction element that is useful in the present invention.
- FIG. 6 is a schematic view of a tunnel junction element showing an example of the present invention.
- FIG. 7 is a diagram showing a method for manufacturing a tunnel junction element showing an embodiment of the present invention.
- FIG. 8 is a diagram showing the temperature characteristics of magnetization and the hysteresis curve of the magnetization of the ferromagnetic electrodes LSMRO and LSMO of the tunnel junction element of the present invention.
- FIG. 9 is a characteristic diagram of controlling the spin coercive force of the tunnel junction element of the present invention by the lattice constant.
- FIG. 10 is a diagram showing a magnetic hysteresis curve of an LSM OZLAOZLSMRO structure multilayer film having the same film configuration as the tunnel junction element shown in the example of the present invention.
- FIG. 11 is a view showing a tunnel resistance ratio of the tunnel junction element of the present invention.
- a B M M 'O type oxide (0 ⁇ x ⁇ l, 0 ⁇ y ⁇ l, ⁇ is the amount of oxygen deficiency).
- Alkaline earth elements such as Ca, Sr, Ba or rare earth elements such as La, elements such as Y, Bi, Pb, and B other than A other alkaline earth elements such as Ca, Sr, Ba or rare earth such as La Earth element, element composed of Y, Bi, Pb, transition metal element such as Mn, Fe, Co, Ni, Cu as M, transition metal element such as Mn, Fe, Co, Ni, Cu other than M as M '
- It has a structure that consists of electrodes made of a ferromagnetic (including ferrimagnetic) conductive solid material and an electrically insulating layer sandwiched between these electrodes.
- FIG. 5 is a schematic sectional view of a tunnel junction element according to the present invention.
- 1 is the lower metal
- 2 is the AB M ⁇ 'O-type oxide ferromagnetism (including ferrimagnetism)
- Conductive electrode, 3 is AB M M 'O-type oxide electrically insulating layer, 4 is AB M M
- one of the two electrodes constituting the element is AB M M '
- O-type oxide ferromagnetic (including ferrimagnetic) conductive electrode the other electrode is A B M
- M'O (y ⁇ y ') type oxide ferromagnetic (including ferrimagnetic) conductive electrodes It has M'O (y ⁇ y ') type oxide ferromagnetic (including ferrimagnetic) conductive electrodes.
- one of the two electrodes constituting the device is an AB MnO type oxide (0 ⁇ 1, ⁇ is the amount of oxygen deficiency), and A is Ca, Sr , Ba lx x 3- ⁇
- alkaline earth element or rare earth element such as La, element consisting of ⁇ , Bi, Pb, B is other than A Alkaline earth element such as Ca, Sr, Ba or rare earth element such as La, Y, Bi, Pb
- ⁇ is the amount of oxygen deficiency) and has an electrode which is a ferromagnetic (including ferrimagnetic) conductive solid material.
- one of the two electrodes constituting the device is made of a La Sr MnO type oxide (0.2 ⁇ x ⁇ 0.5, ⁇ is an oxygen deficiency).
- the electrode made of a conductive solid material (including magnetism) and the other electrode are La Sr Mn Ru O
- the electrode constituting the device is a La Sr MnO type oxide (0.2
- Electrodes made of a magnetic (including ferrimagnetic) conductive solid material are placed on the La Sr MnO type oxide (0.2 ⁇ x ⁇ 0.5, ⁇ is the amount of oxygen deficiency) via an electrical insulating layer.
- the electrical insulating layer is formed of an ABMM'O-type oxide (0 ⁇ x
- ⁇ 1, 0 ⁇ y ⁇ l, ⁇ is the amount of oxygen deficiency
- ⁇ is an alkaline earth element such as Ca, Sr, Ba or a rare earth element such as La, an element consisting of Y, Bi, Pb, and B Ca, Sr, Ba other than
- Alkaline earth elements such as La or rare earth elements such as La, elements composed of Y, Bi, Pb, M as transition metal elements such as Mn, Fe, Co, Ni, Cu, and M 'other than M as Mn, Fe , Co, Ni, Cu, etc. are used.
- the electrical insulating layer is made of SrTiO 3 or LaAlO ( ⁇ is an acid
- At least the above-mentioned ferromagnetic (including ferrimagnetic) conductive solid material constituting an electrode and at least the solid material constituting an electrically insulating layer sandwiched between these electrodes are provided.
- ⁇ x ⁇ 0.5, 0 ⁇ y ⁇ x, ⁇ is the amount of oxygen deficiency) is made from a material that shows a lattice constant of 3.82 angstroms to 3.87 angstroms.
- ⁇ x, ⁇ is the amount of oxygen deficiency
- the substrate temperature should be between 750 ° C and 900 ° C and the oxygen atmosphere pressure was manufactured under the conditions of 133 mPa (ImTorr) and 13.3 Pa (100 mTorr).
- FIG. 6 is a cross-sectional view of a tunnel junction element showing a specific example of the present invention.
- 11 is a lower metal
- 12 is a ferromagnetic metal material of a lower ferromagnetic (including ferrimagnetic) conductive electrode La Sr MnO
- 13 is LaAlO (electrically insulating layer)
- 14 is an upper layer
- Ferromagnetic material including ferrimagnetic Ferromagnetic metal material of conductive electrode La Sr Mn Ru O
- FIG. 7 is a diagram showing a method of manufacturing the tunnel junction element shown in FIG. 6 by a pulse laser deposition method.
- a conductive electrode was formed on the lower electrode by a pulsed laser deposition method.
- the polar ferromagnetic metal material La Sr MnO (LSMO) is formed (Step SI). next,
- LaAlO electrically insulating layer
- a ferromagnetic metal material La Sr Mn Ru O (LSMRO) for the conductive electrode is laminated thereon by a pulse laser deposition method.
- LSMRO ferromagnetic metal material
- FIG. 8 shows the temperature dependence of the magnetization of La Sr MnO (LSMO). Spin's
- the holding power (Hcl) was 10 Oe or less as shown in FIG. 8 (b).
- Figure 8 shows the substrate temperature under the conditions of manufacturing La Sr Mn Ru O (LSMRO) by pulsed laser deposition.
- FIG. 8 (a) shows the temperature dependence of the magnetic field and the magnetic field hysteresis curve when the oxygen partial pressure was changed.
- the manufacturing conditions were (1) 850 ° C, 133mPa (lmTorr), (2) 840 ° C, 6.650Pa (50mTorr), (3) 790. C, 6.650 Pa (50 mTorr).
- La Sr M
- the holding power of 0.6 0.4 1-y y 3- ⁇ (LSMRO) can be controlled by properly selecting its lattice constant, as shown in Fig. 9. Its lattice constant is determined by the laser irradiation target material La Sr Mn Ru O
- the substrate temperature ranges from 750 ° C to 900 ° C
- the oxygen partial pressure ranges from 133 mPa (lmTorr) to 13.3 Pa (100 mTorr).
- FIG. 10 shows a hysteresis curve of the multilayer film LSMOZLAOZLSMRO constituting the tunnel junction element.
- LSMO La Sr MnO
- Fig. 11 shows the MR ratio of a junction element with electrodes at the top and bottom.
- the mouth is doped with Ru
- Ru This is the MR ratio of the tunnel junction element in the case of the LSMOZLAOZLSMO structure with no film configuration.
- ⁇ is the MR ratio of the tunnel junction element in the case of the LSMOZL AOZLSMRO structure, which is a Ru-doped film configuration that is useful in the present invention.
- Ru-doped film configuration that is useful in the present invention.
- the tunnel junction element in the case of the LSMOZLAOZLSMRO structure can be made of a Mn oxide material having a spin polarization rate that is unprecedented in the tunnel junction element force that ensures a sufficient holding force.
- the difference in holding force between the upper and lower ferromagnetic electrodes can be controlled by the manufacturing conditions at the time of film formation.
- an appropriate spin holding force can be controlled in accordance with the strength of the magnetization of the storage medium material and the leakage magnetic field at the sensor position at the distance of the storage medium force.
- the new CMR element can operate as a magnetic sensor that operates stably with controlled spin holding force.
- the new CMR element based on the present invention is not limited to application to magnetic sensors.
- This new CMR device can be applied to magnetic memory devices that are currently being rapidly developed. Also, if the spin direction of the ferromagnetic (including ferrimagnetic) conductive electrode material is maintained in an antiparallel state, it can contribute to a dramatic reduction in the tunnel current passing through the oxide film.
- the invention can be applied not only to magnetic memories but also to basic elements of a wide range of information networks.
- a magnetic sensor showing a controlled holding force which is a problem of a CMR element Can be provided.
- a magnetic head capable of supporting a recording density of 100 Gbit / (inch) 2 or 1000 Gbit Z (inch) 2 .
- a CMR element exhibiting characteristics as a constituent element of a magnetic memory comparable to DRAM and FeRAM.
- the device of the present invention is suitable for a high-performance magnetic sensor with controlled spin holding force.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/591,246 US7485937B2 (en) | 2004-03-05 | 2005-02-25 | Tunnel junction device |
JP2006510651A JPWO2005086250A1 (ja) | 2004-03-05 | 2005-02-25 | トンネルジャンクション素子 |
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JP2004062073 | 2004-03-05 | ||
JP2004-062073 | 2004-03-05 |
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JP (1) | JPWO2005086250A1 (ja) |
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Cited By (1)
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CN105405967A (zh) * | 2015-12-22 | 2016-03-16 | 北京师范大学 | 一种信息存储单元以及只读存储器 |
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US7580276B2 (en) * | 2005-03-23 | 2009-08-25 | National Institute Of Advanced Industrial Science And Technology | Nonvolatile memory element |
JP2006269688A (ja) * | 2005-03-23 | 2006-10-05 | National Institute Of Advanced Industrial & Technology | 不揮発性メモリ素子 |
WO2015064663A1 (ja) * | 2013-10-31 | 2015-05-07 | 独立行政法人科学技術振興機構 | スピン制御機構及びスピンデバイス |
CN113539654B (zh) * | 2020-04-13 | 2023-05-02 | 中国科学院宁波材料技术与工程研究所 | 调控并增强lsmo薄膜磁各向异性的方法、磁各向异性可调的lsmo薄膜及其制备方法 |
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JP2000357828A (ja) * | 1999-06-15 | 2000-12-26 | Matsushita Electric Ind Co Ltd | 強磁性酸化物およびこれを用いた磁気抵抗素子 |
JP2003068983A (ja) * | 2001-06-28 | 2003-03-07 | Sharp Corp | 電気的にプログラム可能な抵抗特性を有する、クロストークが低いクロスポイントメモリ |
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US6117571A (en) * | 1997-03-28 | 2000-09-12 | Advanced Technology Materials, Inc. | Compositions and method for forming doped A-site deficient thin-film manganate layers on a substrate |
JP2001320108A (ja) * | 2000-05-02 | 2001-11-16 | Canon Inc | 磁気抵抗素子、磁気メモリ及び磁気センサー |
JP4050446B2 (ja) * | 2000-06-30 | 2008-02-20 | 株式会社東芝 | 固体磁気メモリ |
JP4309075B2 (ja) * | 2000-07-27 | 2009-08-05 | 株式会社東芝 | 磁気記憶装置 |
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- 2005-02-25 US US10/591,246 patent/US7485937B2/en not_active Expired - Fee Related
- 2005-02-25 JP JP2006510651A patent/JPWO2005086250A1/ja active Pending
- 2005-02-25 WO PCT/JP2005/003099 patent/WO2005086250A1/ja active Application Filing
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JP2000357828A (ja) * | 1999-06-15 | 2000-12-26 | Matsushita Electric Ind Co Ltd | 強磁性酸化物およびこれを用いた磁気抵抗素子 |
JP2003068983A (ja) * | 2001-06-28 | 2003-03-07 | Sharp Corp | 電気的にプログラム可能な抵抗特性を有する、クロストークが低いクロスポイントメモリ |
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CN105405967A (zh) * | 2015-12-22 | 2016-03-16 | 北京师范大学 | 一种信息存储单元以及只读存储器 |
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