WO2006064937A1 - ナノコンポジット磁石及びその製造方法 - Google Patents
ナノコンポジット磁石及びその製造方法 Download PDFInfo
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- WO2006064937A1 WO2006064937A1 PCT/JP2005/023208 JP2005023208W WO2006064937A1 WO 2006064937 A1 WO2006064937 A1 WO 2006064937A1 JP 2005023208 W JP2005023208 W JP 2005023208W WO 2006064937 A1 WO2006064937 A1 WO 2006064937A1
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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
- H01F10/3222—Exchange coupled hard/soft multilayers, e.g. CoPt/Co or NiFe/CoSm
-
- 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
-
- 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
-
- 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
-
- 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
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0579—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B with exchange spin coupling between hard and soft nanophases, e.g. nanocomposite spring magnets
-
- 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
- H01F41/18—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 cathode sputtering
Definitions
- the invention of this application relates to a nanocomposite magnet and a manufacturing method thereof. More specifically, the invention of this application has excellent magnetic properties such as high coercive force, high energy / gap, and good squareness, and can be used widely as a thin film magnet with a wide choice of usage environment.
- the present invention relates to a nanocomposite magnet that can be manufactured and a manufacturing method thereof. Background art
- Sm_Co-based bulk magnets are attracting attention as high-temperature magnet materials for aircraft, etc. because the single point is about 45 Ot, which is higher than about 300 for Nd 2 F e 14 B-based magnets. Has been done.
- sintered magnets with a composition close to Sm 2 (Co, Fe, Cu, Zr) 17 are used as bulk magnets.
- MEMS micro-electromechanical system
- the thin-film magnets currently being developed are basically composed of only hard magnetic phases, and there are phases that crystallize out as by-products in the process, but the second phase is actively improved in magnetic properties. It is not a thin film magnet used for
- the maximum value of the maximum energy product currently obtained for nanocomposite magnets in which a hard magnetic phase and a soft magnetic phase are exchange-coupled is the a—: Fe / (Nd, Dy) (a— FeZNd 2 Fe 14 B system. Fe, Co, Nb, B) 5.
- the invention of this application was made in view of the actual situation of the prior art, and has excellent magnet characteristics such as high coercive force, high maximum energy product, and good squareness, and can be used in a wide range of usage environments. It is an object of the present invention to provide a nanocomposite magnet that can be selected and suitably used as a thin film magnet and a method for manufacturing the nanocomposite magnet.
- the invention of this application is firstly a nano-structure substantially composed of a hard magnetic phase having a composition of Sm (Co, Cu) 5 and a soft magnetic phase made of Fe.
- a composite magnet which has a multilayer structure in which layers of hard magnetic phases and layers of soft magnetic phases are alternately and repeatedly laminated, and the layers of hard magnetic phases are solidified with Cu in the SmCo 5 phase.
- a nanocomposite magnet having a multilayer structure in which a layer that is a hard magnetic phase and a layer that is a soft magnetic phase are alternately and repeatedly laminated, and the layer that is a hard magnetic phase is a SmCo C for 5 phases Provide nanocomposite magnets characterized by U in solid solution.
- a method for producing a nanocomposite magnet substantially composed of a hard magnetic phase having a composition of Sm (Co, Cu) 5 and a soft magnetic phase composed of Fe, which is formed on a substrate SmCo x [X is an atomic ratio of 4.5 ⁇ x ⁇ 6.5]
- Layers and Fe layers were laminated alternately by sputtering via Cu layer to form a multilayer film After that, a method for producing a nanocomposite magnet characterized by heat treatment is provided.
- the fourth substantially a hard magnetic phase having a composition of Sm (Co, Cu) 5, Fej_ y Co y [y is 0 ⁇ y rather 0.4 in atomic ratio] and soft magnetic phases consisting of
- a method for producing a nanocomposite magnet comprising: a layer having a composition of SmCo x [X is 4.5 ⁇ x ⁇ 6.5] in atomic ratio and an Fe Co layer on a substrate;
- a method for producing a nanocomposite magnet is provided, in which a multilayer film is formed by alternately and repeatedly stacking by a sputtering method, and then heat treatment is performed.
- a layer that is a hard magnetic phase having a composition of Sm (Co, Cu) 5 and a layer that is a soft magnetic phase made of Fe or FeCo are crossed.
- Cu acts to increase the coercivity of the Sm Co 5 phase
- the magnetization capacity of the SmCo 5 phase in which Cu is dissolved Since the axis is preferentially oriented in the in-plane direction, it is possible to maintain good squareness in the in-plane magnetization curve, resulting in a higher maximum energy product compared to conventional Sm—CoZFe-based nanocomposite magnets. It becomes possible.
- the third and fourth inventions of this application is substantially composed of a hard magnetic phase having a composition of Sm (Co, Cu) 5 and a soft magnetic phase made of Fe or F e Co. in producing a Luna Bruno composite magnet, by a to SmC o x layer and the F e layer without F e C o layer were laminated alternately through the Cu layer, SmCo 5 in the heat treatment for the crystallization of SmCo 5 Interdiffusion between the layer and the Fe layer or FeCo layer is suppressed.
- the interdiffusion between the SmC o 5 layer and the Fe layer or the Fe Co layer was suppressed, so that high characteristics with a desired thickness in the range of tens of nanometers to several meters were achieved.
- a nanocomposite magnet is realized.
- the fabrication of multilayer films by the sputtering method is an established technology, and the insertion of the Cu layer can be performed very easily, so that no equipment modification is required.
- MEMS micro-electromecliaiiical system
- FIG. 1 is a diagram showing an X-ray diffraction pattern of the nanocomposite thin film magnet of Example 4 and a heat-treated multilayer film immediately after film formation (as-depo) and not containing Cu.
- FIG. 2 is a diagram showing X-ray diffraction patterns of the nanocomposite thin film magnet of Example 5 and a multilayer film not containing Cu.
- FIG. 3 is a cross-sectional TEM (transmission electron microscope) image of the nanocomposite thin film magnet of Example 5.
- Fig. 4 shows the element mapping image of the nanocomposite thin film magnet of Example 5.
- Fig. 5 shows the nanocomposite thin film magnet of Examples 1, 4, and 7 and a multilayer containing no Cu. It is a figure which shows the magnetization curve of a film
- FIG. 6 is a diagram showing a magnetization curve perpendicular to the in-plane and the plane of the nanocomposite thin film magnet of Example 4.
- a first nanocomposite magnet according to the invention of this application is a layer that is substantially composed of a hard magnetic phase having a composition of Sm (Co, Cu) 5 and a soft magnetic phase made of Fe and is a hard magnetic phase. And the soft magnetic phase layer are alternately and repeatedly laminated, and the hard magnetic phase layer is in a state where Cu is dissolved in the SmCo 5 phase. To do.
- the second nanocomposite magnet according to the invention of this application includes a hard magnetic phase having a composition of Sm (Co, Cu) 5 and Fe! —Y Co y [y is an atomic ratio of 0 ⁇ y ⁇ 0. 4]
- Cu is in a solid solution state in the Sm Co 5 phase.
- the inventors of this application have refined the nanocomposite structure of the SmC o 5 phase layer and the Fe phase or Fe Co phase layer, and laminated both layers. At the same time, by laminating both layers alternately via the Cu layer, the interfacial diffusion of the SmCo 5 phase and the Fe phase or FeCo phase is suppressed to optimize the interface structure (form a steep interface structure).
- High coercivity, high maximum energy product, A nanocomposite magnet that has excellent magnet properties such as good squareness, can be used widely as a thin film magnet, and can be used in a wide range of operating environments. According to the nanocomposite magnet of the invention of this application, it was confirmed that a maximum energy product exceeding 3 OMGOe was obtained.
- the thickness of one layer of Sm (Co, Cu) 5 layers (hard magnetic phase) is about 5 to: L 5 nm It is preferable. If the film thickness of one of the five Sm (Co, Cu) layers is within the above range, the hard magnetic phase and soft magnetic phase are exchange-coupled to obtain a high coercive force and a high remanent magnetization, realizing a high maximum energy product. Will be able to contribute. If the thickness of one of the five Sm (Co, Cu) layers is too thin, the volume fraction of the soft magnetic layer increases relatively, so the coercive force decreases and the maximum energy product decreases.
- the thickness of one layer of the Fe layer or FeCo layer is preferably about 3 to: L Onm. If the thickness of one layer of the Fe layer or FeCo layer is in the above range, the hard magnetic phase and soft magnetic phase are exchange-coupled to obtain high remanent magnetization, contributing to the realization of a high maximum energy product. become able to. If the thickness of one layer of the Fe layer or the FeCo layer is too thin, the increase in remanent magnetization cannot be obtained, so the maximum energy product increment decreases, and if it is too thick, magnetization reversal occurs easily.
- the total film thickness of the Sm (Co, Cu) 5 layer and the Fe layer or FeCo layer is not particularly limited, but when used as a thin film magnet, it is usually about several im.
- the high coercive force and the high residual magnetization are not attributed to the shape of the thin film, so the Sm (Co, Cu) 5 layer and the Fe layer or The number of layers in the FeCo layer set can be increased by stacking a large number of sets, but when used as a thin film magnet, the number of layers should be set according to the film thickness of the entire multilayer film. Set.
- the composition ratio of Cu to Co is preferably about 0.1 to 0.4 in terms of atomic ratio.
- the composition ratio of Cu is Sm Co 5 has high coercive force and high remanent magnetization, contributing to the achievement of a high maximum energy product.
- FeCo When FeCo is used instead of Fe as the soft magnetic phase, FeCo has a higher saturation magnetization than Fe, so the maximum energy product increases by about 20% compared to when Fe is used. in this case, it is preferable that y is 0 and y is 0.4 in atomic ratio in order to further increase the maximum energy product through high saturation magnetization.
- a layer such as a base layer or a protective layer made of a metal material such as Cr may be provided.
- a method for producing the nanocomposite magnet of the invention of this application will be described.
- the method for producing a nanocomposite magnet of the invention of this application is the following: a layer having a composition of SmCo x [X is 4.5 ⁇ x ⁇ 6.5] and an Fe layer or FeCo layer on a substrate; In particular, a multilayer film is formed by alternately and repeatedly layering by sputtering, and then heat treatment is performed.
- Each layer is formed using a sputtering method in an atmosphere in which an inert gas such as Ar is flowed.
- the substrate various glass substrates, plastic substrates, semiconductor substrates (for example, a silicon substrate with a thermal oxide film) and the like can be used.
- SmCo x layer (hard magnetic phase) before heat treatment in order for the Sm (Co, Cu) layer after heat treatment to obtain high coercivity and high remanent magnetization, X is 4.5 ⁇ x ⁇ 6.5. It is necessary to be. If X is out of the above range, the coercive force and remanent magnetization values in the hard magnetic phase become insufficient, and a high maximum energy product cannot be obtained.
- the SmCo soot layer immediately after film formation before heat treatment is an amorphous phase, and by heat treatment, Cu is diffused from the Cu layer and crystallized into Sm (Co, Cu) 5 phase.
- a nanocomposite magnet is a magnet that uses exchange coupling between a hard magnetic phase and a soft magnetic phase. Therefore, in order to obtain high maximum energy in the nanocomposite magnet, the soft magnetic phase needs to have a large remanent magnetization. In addition, the soft magnetic phase must have no solid solubility with Cu. For this reason, the soft magnetic phase layer is O layer was used.
- a Cu layer is provided between the hard magnetic phase layer and the soft magnetic phase layer before the heat treatment.
- This Cu layer suppresses interdiffusion between the SmCo 5 phase and the Fe or Fe Co layer by heat treatment, optimizes the interface structure, and exhibits a high coercive force and high remanent magnetization in the SmCo 5 phase. do.
- the thickness of one layer of the SmCo x layer is preferably 5 to 15 nm. If the film thickness of one of the five Sm (Co, Cu) layers is within the above range, the hard magnetic phase and the soft magnetic phase are exchange-coupled to obtain a high coercive force and a high remanent magnetization, and a high maximum energy density. Can contribute to the realization of If the thickness of one layer of the SmC o x layer is too thin, the volume fraction of the soft magnetic layer will increase relatively, so the coercive force will decrease, the maximum energy product will decrease, and if it is too thick, it will be relatively soft magnetic. Since the layer is reduced, the remanent magnetization cannot be increased and the maximum energy product increment is reduced. ?
- the thickness of one of the 0 layers is preferably 3 to 10 nm. If the thickness of one layer of the Fe layer to the Fe Co layer is within the above range, The hard magnetic phase and the soft magnetic phase are exchange-coupled to achieve high remanence and contribute to the realization of a high maximum energy product Fe layer or Fe Co layer is too thin Since the increase in remanent magnetization cannot be obtained, the increment of the maximum energy product is reduced, and if it is too thick, magnetization reversal occurs easily, so the coercive force is greatly reduced and the maximum energy product is reduced.
- the film thickness of one layer of the Cu layer is preferably 0.3 to 1 nm
- the film thickness of one layer of the Cu layer is within the above range because, as described above, the SmCo 5 phase and the Fe phase or This is to suppress interdiffusion of the FeCo layer, to optimize the interface structure, and to exhibit high coercivity and high remanent magnetization of the SmC o 5 phase. If the layer thickness is too thin or too thick, the desired effect cannot be obtained.
- the total film thickness of the SmCo 5 layer, Cu layer, Fe layer or FeCo layer is not particularly limited, but is usually about several meters when used as a thin film magnet.
- the number of layers of the SmCo x layer and Fe layer or FeCo layer can be increased by stacking a large number of layers, but when used as a thin film magnet, the film thickness of the entire multilayer film.
- the number of layers is set corresponding to In the manufacturing method of the nanocomposite magnet of the invention of this application, the heat treatment is performed after the laminated film is formed.
- the heat treatment temperature is preferably about 450 to 525. In particular, in the treatment on the low temperature side, remarkable improvement in the magnetic properties is seen compared to the conventional type nanocomposite magnet. This is.
- a process for forming a layer such as an underlayer or a protective layer made of a metal material such as Cr is further provided. It may be provided.
- the Cr layer is thick
- a SmCo 6 layer was formed to a thickness of 9 nm as a hard magnetic phase.
- 11 layers were formed to a thickness of 0.3 nm, and an Fe layer was formed as a soft magnetic phase.
- 5 nm Cu layer thickness 0.3 nm, 6 'SmCo 6 layers, Fe layers are stacked via Cu layer, and S m Co 6 layer is A 9 nm film was formed, and finally a Cr layer was formed as a protective layer to a thickness of 100 nm to produce a multilayer film.
- Atmosphere Ar gas, 0. lPa
- Nanocomposite thin film magnets of Examples 4 to 6 were obtained in the same manner as in Examples 1 to 3, except that the thickness of each Cu film was 0.5 nm.
- FIG. 1 shows X-ray diffraction patterns of the nanocomposite thin film magnet of Example 4, a multilayer film immediately after deposition (as-depo) containing no Cu, and a multilayer film subjected to heat treatment.
- as-depo multilayer film immediately after deposition
- a multilayer film subjected to heat treatment In the multilayer film immediately after film formation without CU, diffraction lines due to hexagonal SmCo 5 are not observed, indicating that SmCo 5 is amorphous immediately after film formation.
- Fig. 2 shows the X-ray diffraction patterns of the nanocomposite thin film magnet of Example 5 and the multilayer film not containing Cu.
- FIG. 3 shows a cross-sectional TEM (transmission electron microscope) image of the nanocomposite thin film magnet of Example 5.
- FIG. 4 shows an element mapping image of the nanocomposite thin film magnet of Example 5. The bright part means that the element is rich, and the dark part means that the element is poor. From this figure, it can be seen that Cu diffuses into the SmCo 5 phase and that Cu contributes to the realization of a steep interface between the soft magnetic layer and the hard magnetic phase.
- Fig. 5 shows the magnetization curves of the nanocomposite thin film magnets of Examples 1, 4, and 7 and the multilayer film not containing Cu. Magnetization curves were obtained with a SQUID apparatus. From Fig. 5, the coercive force increases greatly as the Cu concentration (Cu film thickness) increases, but the coercive force decreases when it exceeds a certain Cu concentration. From the initial magnetization curve, it can be seen that the nanocomposite thin film magnets of Examples 1 to 9 are pinning type magnets. This it is thought the effect of intrinsic pinning the Cu is to occur in solid solution in SmCo 5. In other words, the presence of the Cu phase not only suppresses the interdiffusion of SmC0 5 / Fe, but also increases the coercive force of SmC0 5 .
- FIG. 6 shows a magnetization curve perpendicular to the in-plane and surface of the nanocomposite thin film magnet of Example 4. From this figure, it can be seen that the nanocomposite thin film magnet of the example has a magnetization easy axis in the plane and is an anisotropic magnet. For this reason, excellent squareness is obtained in the in-plane direction. This is the reason for the high maximum energy product.
- Table 1 shows the coercivity, remanence and maximum energy product of the nanocomposite thin film magnets of Examples 1 to 9.
- the maximum energy product is a large value exceeding 30 MGOe compared to the value of about 2 OMGOe reported in Non-Patent Documents 3 and 4. Also, the coercive force and the residual magnetization are maintained at high values. table 1
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Abstract
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JP2004-360408 | 2004-12-13 | ||
JP2004360408A JP4654409B2 (ja) | 2004-12-13 | 2004-12-13 | ナノコンポジット磁石の製造方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2157588A1 (en) * | 2008-08-22 | 2010-02-24 | MINEBEA Co., Ltd. | Method of manufacturing rotor magnet for micro rotary electric machine |
CN102766835A (zh) * | 2012-07-26 | 2012-11-07 | 内蒙古科技大学 | 一种制备高性能SmCo永磁材料的方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4924153B2 (ja) * | 2007-03-30 | 2012-04-25 | Tdk株式会社 | 磁性材料及びこれを用いた磁石 |
JP5330785B2 (ja) * | 2008-09-22 | 2013-10-30 | トヨタ自動車株式会社 | NdFeB/FeCoナノコンポジット磁石 |
KR102043951B1 (ko) * | 2013-09-24 | 2019-11-12 | 엘지전자 주식회사 | 층구조를 갖는 경연자성 복합 자석 및 이의 제조방법 |
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JPH04219912A (ja) * | 1990-12-19 | 1992-08-11 | Yaskawa Electric Corp | 希土類薄膜磁石の形成方法 |
JPH097833A (ja) * | 1995-06-15 | 1997-01-10 | Sumitomo Metal Ind Ltd | 薄膜磁石 |
JPH09162034A (ja) * | 1995-12-08 | 1997-06-20 | Yaskawa Electric Corp | 膜磁石及びその形成方法 |
JPH09237714A (ja) * | 1995-12-27 | 1997-09-09 | Hitachi Metals Ltd | 薄膜磁石ならびにr−tm−b系交換スプリング磁石およびその製造方法 |
JPH09266113A (ja) * | 1996-03-29 | 1997-10-07 | Hitachi Metals Ltd | 硬磁性薄膜ならびに交換スプリング磁石およびその製造方法 |
JPH11214219A (ja) * | 1998-01-27 | 1999-08-06 | Tdk Corp | 薄膜磁石およびその製造方法 |
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JPH07106127A (ja) * | 1993-10-01 | 1995-04-21 | Toshiba Corp | 磁性膜およびそれを用いた磁気記録媒体 |
JP4614046B2 (ja) * | 2003-09-12 | 2011-01-19 | 学校法人早稲田大学 | Sm−Co合金系垂直磁気異方性薄膜及びその形成方法 |
JP3926356B2 (ja) * | 2004-09-17 | 2007-06-06 | 独立行政法人科学技術振興機構 | 磁気力顕微鏡用の磁性探針及びその製造方法 |
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- 2004-12-13 JP JP2004360408A patent/JP4654409B2/ja not_active Expired - Fee Related
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- 2005-12-13 WO PCT/JP2005/023208 patent/WO2006064937A1/ja active Application Filing
Patent Citations (6)
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JPH04219912A (ja) * | 1990-12-19 | 1992-08-11 | Yaskawa Electric Corp | 希土類薄膜磁石の形成方法 |
JPH097833A (ja) * | 1995-06-15 | 1997-01-10 | Sumitomo Metal Ind Ltd | 薄膜磁石 |
JPH09162034A (ja) * | 1995-12-08 | 1997-06-20 | Yaskawa Electric Corp | 膜磁石及びその形成方法 |
JPH09237714A (ja) * | 1995-12-27 | 1997-09-09 | Hitachi Metals Ltd | 薄膜磁石ならびにr−tm−b系交換スプリング磁石およびその製造方法 |
JPH09266113A (ja) * | 1996-03-29 | 1997-10-07 | Hitachi Metals Ltd | 硬磁性薄膜ならびに交換スプリング磁石およびその製造方法 |
JPH11214219A (ja) * | 1998-01-27 | 1999-08-06 | Tdk Corp | 薄膜磁石およびその製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2157588A1 (en) * | 2008-08-22 | 2010-02-24 | MINEBEA Co., Ltd. | Method of manufacturing rotor magnet for micro rotary electric machine |
CN102766835A (zh) * | 2012-07-26 | 2012-11-07 | 内蒙古科技大学 | 一种制备高性能SmCo永磁材料的方法 |
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JP4654409B2 (ja) | 2011-03-23 |
JP2006173210A (ja) | 2006-06-29 |
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