JP4617279B2 - 磁気回路および磁場印加方法 - Google Patents
磁気回路および磁場印加方法 Download PDFInfo
- Publication number
- JP4617279B2 JP4617279B2 JP2006217814A JP2006217814A JP4617279B2 JP 4617279 B2 JP4617279 B2 JP 4617279B2 JP 2006217814 A JP2006217814 A JP 2006217814A JP 2006217814 A JP2006217814 A JP 2006217814A JP 4617279 B2 JP4617279 B2 JP 4617279B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic field
- magnet
- permanent magnet
- magnetic circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0231—Magnetic circuits with PM for power or force generation
- H01F7/0247—Orientating, locating, transporting arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0205—Magnetic circuits with PM in general
-
- 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
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/852—Orientation in a magnetic field
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
Description
12 軟磁性裏打ち層(SUL)
13 磁気記録層
14 保護層
15 潤滑層
16 核付け膜
20 磁場印加部(磁石)
Claims (4)
- 互いに平行となるように対向して設けられた複数の磁場印加部の間に形成される空隙内に試料を収容して磁場を印加する磁気回路であって、
前記磁場印加部のそれぞれは複数の永久磁石のセグメントを組み合わせて構成されており、
前記永久磁石のセグメントのひとつは前記磁場印加部の対向面に平行な方向に水平磁化した第1の永久磁石であり、
該第1の永久磁石のN極側には前記磁場印加部の対向面に垂直な方向に垂直磁化した第2の永久磁石が設けられ、
該第1の永久磁石のS極側には前記第2の磁石と逆向きの方向に垂直磁化した第3の永久磁石が設けられ、
前記磁場印加部は前記第1乃至第3の永久磁石を複数組み合わせて仮想中心軸の周りにリング状に構成されており、
前記第1の永久磁石は該磁石の磁化方向が前記仮想中心軸に向かう方向と垂直となるように配置され、
前記リング状の磁場印加部の一部に前記第1乃至第3の永久磁石の何れかの永久磁石が配置されていない切り欠け部が設けられていることを特徴とする磁気回路。 - 前記第1の永久磁石は他の第1の永久磁石と前記第2又は第3の永久磁石を介して隣接しており、前記第1の永久磁石の磁化方向は、前記他の第1の永久磁石の磁化方向と概ね90°異なることを特徴とする請求項1に記載の磁気回路。
- 前記磁石は保磁力20kOe以上の2−17型SmCo系磁石であり、前記空隙が50mm以上100mm以下であることを特徴とする請求項1または2に記載の磁気回路。
- 請求項1乃至3の何れか1項に記載の磁気回路を用い、前記空隙に円板状試料を収容し、該円板状試料の中心軸を前記磁気回路の仮想中心軸に一致させた状態で前記円板状試料と磁気回路に相対的回転速度を与え、該円板状試料の全面に面内周方向若しくは面内系方向の磁場を印加することを特徴とする磁場の印加方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006217814A JP4617279B2 (ja) | 2006-08-10 | 2006-08-10 | 磁気回路および磁場印加方法 |
US11/889,165 US7821366B2 (en) | 2006-08-10 | 2007-08-09 | Magnetic circuit and method of applying magnetic field |
US12/591,785 US8013701B2 (en) | 2006-08-10 | 2009-12-01 | Magnetic circuit and method of applying magnetic field |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006217814A JP4617279B2 (ja) | 2006-08-10 | 2006-08-10 | 磁気回路および磁場印加方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008041223A JP2008041223A (ja) | 2008-02-21 |
JP4617279B2 true JP4617279B2 (ja) | 2011-01-19 |
Family
ID=39176043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006217814A Expired - Fee Related JP4617279B2 (ja) | 2006-08-10 | 2006-08-10 | 磁気回路および磁場印加方法 |
Country Status (2)
Country | Link |
---|---|
US (2) | US7821366B2 (ja) |
JP (1) | JP4617279B2 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7796358B1 (en) * | 2005-03-04 | 2010-09-14 | Seagate Technology Llc | Method and apparatus for eliminating spike noise in a soft magnetic underlayer |
US8415839B2 (en) | 2009-01-09 | 2013-04-09 | United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration | Apparatus and methods for mitigating electromagnetic emissions |
TWI384510B (zh) * | 2010-11-12 | 2013-02-01 | Ind Tech Res Inst | 均勻磁場產生設備及其磁場產生單元 |
US8424393B1 (en) * | 2011-10-18 | 2013-04-23 | Methode Electronics, Inc. | Magnetic torque sensor for transmission converter drive plate |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6233337A (ja) * | 1985-08-07 | 1987-02-13 | Sony Corp | 円盤状磁気記録媒体の配向方法 |
JP2003272143A (ja) * | 2002-03-20 | 2003-09-26 | Fuji Photo Film Co Ltd | 磁気転写装置 |
WO2004077413A1 (ja) * | 2003-02-19 | 2004-09-10 | Neomax Co., Ltd. | 磁場中熱処理装置 |
JP2005209326A (ja) * | 2003-12-25 | 2005-08-04 | Shin Etsu Chem Co Ltd | 径方向磁場発生用磁気回路 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB842531A (en) * | 1958-12-24 | 1960-07-27 | Mullard Ltd | Permanent magnets |
US5107238A (en) * | 1991-04-01 | 1992-04-21 | The United States Of America As Represented By The Secretary Of The Army | Magnetic cladding for use in periodic permanent magnet stacks |
JPH05143972A (ja) | 1991-11-19 | 1993-06-11 | Kubota Corp | 金属薄膜型磁気記録媒体およびその製造法 |
US5126713A (en) * | 1991-12-20 | 1992-06-30 | The United States Of America As Represented By The Secretary Of The Army | Hemispherical cladding for permanent magnet solenoids |
US5382303A (en) * | 1992-04-13 | 1995-01-17 | Sps Technologies, Inc. | Permanent magnets and methods for their fabrication |
US5815342A (en) * | 1992-07-13 | 1998-09-29 | Kabushiki Kaisha Toshiba | Perpendicular magnetic recording/reproducing apparatus |
JP2899190B2 (ja) * | 1993-01-08 | 1999-06-02 | 信越化学工業株式会社 | マグネトロンプラズマ用永久磁石磁気回路 |
JP2756471B2 (ja) * | 1993-03-12 | 1998-05-25 | セイコーインスツルメンツ株式会社 | ラジアル配向磁石の製造方法およびラジアル配向磁石 |
JP2003016620A (ja) * | 2001-06-29 | 2003-01-17 | Toshiba Corp | 磁気記録媒体、磁気記録装置および磁気記録方法 |
US6758146B2 (en) * | 2001-06-29 | 2004-07-06 | The Regents Of The University Of California | Laminated track design for inductrack maglev systems |
US6717296B2 (en) * | 2001-08-22 | 2004-04-06 | Asml Netherlands B.V. | Lithographic apparatus and motor for use in the apparatus |
US6906446B2 (en) * | 2001-09-05 | 2005-06-14 | The Regents Of The University Of California | Halbach array generator/motor having mechanically regulated output voltage and mechanical power output |
US6828890B2 (en) * | 2001-09-26 | 2004-12-07 | Engineering Matters, Inc. | High intensity radial field magnetic array and actuator |
EP1300932B1 (en) * | 2001-10-05 | 2013-12-18 | Canon Kabushiki Kaisha | Linear motor, stage apparatus, and exposure apparatus |
US7148778B2 (en) * | 2001-11-30 | 2006-12-12 | The Regents Of The University Of California | High performance hybrid magnetic structure for biotechnology applications |
US7352268B2 (en) * | 2002-09-26 | 2008-04-01 | Engineering Matters, Inc. | High intensity radial field magnetic actuator |
US6876284B2 (en) * | 2002-09-26 | 2005-04-05 | Engineering Matters, Inc. | High intensity radial field magnetic array and actuator |
JP2005143972A (ja) | 2003-11-18 | 2005-06-09 | Olympia:Kk | 弾球遊技機 |
US7148777B2 (en) * | 2004-02-03 | 2006-12-12 | Astronautics Corporation Of America | Permanent magnet assembly |
-
2006
- 2006-08-10 JP JP2006217814A patent/JP4617279B2/ja not_active Expired - Fee Related
-
2007
- 2007-08-09 US US11/889,165 patent/US7821366B2/en not_active Expired - Fee Related
-
2009
- 2009-12-01 US US12/591,785 patent/US8013701B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6233337A (ja) * | 1985-08-07 | 1987-02-13 | Sony Corp | 円盤状磁気記録媒体の配向方法 |
JP2003272143A (ja) * | 2002-03-20 | 2003-09-26 | Fuji Photo Film Co Ltd | 磁気転写装置 |
WO2004077413A1 (ja) * | 2003-02-19 | 2004-09-10 | Neomax Co., Ltd. | 磁場中熱処理装置 |
JP2005209326A (ja) * | 2003-12-25 | 2005-08-04 | Shin Etsu Chem Co Ltd | 径方向磁場発生用磁気回路 |
Also Published As
Publication number | Publication date |
---|---|
US20080074783A1 (en) | 2008-03-27 |
JP2008041223A (ja) | 2008-02-21 |
US8013701B2 (en) | 2011-09-06 |
US20100117775A1 (en) | 2010-05-13 |
US7821366B2 (en) | 2010-10-26 |
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