发明授权
- 专利标题: THIN FILM RARE EARTH PERMANENT MAGNET, AND METHOD FOR MANUFACTURING THE PERMANENT MAGNET
- 专利标题(中): 薄膜稀土永磁及其制备方法
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申请号: EP01984520.5申请日: 2001-07-30
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公开(公告)号: EP1329912B1公开(公告)日: 2008-06-25
- 发明人: YAMASHITA, Osamu , MAKITA, Ken
- 申请人: Neomax Co., Ltd.
- 申请人地址: 7-19, Kitahama 4-chome, Chuo-ku Osaka-shi, Osaka 541-0041 JP
- 专利权人: Neomax Co., Ltd.
- 当前专利权人: Neomax Co., Ltd.
- 当前专利权人地址: 7-19, Kitahama 4-chome, Chuo-ku Osaka-shi, Osaka 541-0041 JP
- 代理机构: Butler, Lance
- 优先权: JP2000233936 20000802
- 国际公布: WO2002015206 20020221
- 主分类号: H01F10/12
- IPC分类号: H01F10/12 ; H01F1/04 ; C23C14/14 ; H01F10/32 ; H01F41/30
摘要:
A thin film rare earth permanent magnet capable of making the thin film by vapor growth anisotropic ina lamination direction, and a method for manufacturing the permanent magnet. There are repeated a number of operations to form atomic laminate units (13) by laminating a monoatomic layer (10) of a rare earth element on a substrate (1) of a non-magnetic material having a flat smoothness and then by laminating an atomic laminate (12) of a transient metal element having a plurality of monoatomic layers (11) of a transient metal element, so that the atomic laminate units (13) of a characteristic construction are laminated in a plurality of layers. As a result, each atomic laminate (12) has an easily magnetizable axis in the laminate direction of the monoatomic layers (11), and is sandwiched between the monoatomic layers (10, 10) of the rare earth element so that an inverse magnetic domain is suppressed to establish a strong coercive force. Moreover, the content of the transient metal element to the rare earth metal is raised to improve the residual magnetic flux density drastically.
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