发明授权
- 专利标题: Laminated magnetic thin films for magnetic recording with weak ferromagnetic coupling
- 专利标题(中): 具有弱铁磁耦合的磁记录层压磁薄膜
-
申请号: US11475281申请日: 2006-06-26
-
公开(公告)号: US08263239B2公开(公告)日: 2012-09-11
- 发明人: Andreas Klaus Berger , Hoa Van Do , Eric Edward Fullerton , David Thomas Margulies , Natacha Frederique Supper
- 申请人: Andreas Klaus Berger , Hoa Van Do , Eric Edward Fullerton , David Thomas Margulies , Natacha Frederique Supper
- 申请人地址: NL Amsterdam
- 专利权人: HGST Netherlands B.V.
- 当前专利权人: HGST Netherlands B.V.
- 当前专利权人地址: NL Amsterdam
- 代理商 G. Marlin Knight
- 主分类号: G11B5/66
- IPC分类号: G11B5/66
摘要:
A laminated magnetic recording structure for use in perpendicular or longitudinal recording is described. A small amount of ferromagnetic coupling is added between the two magnetic layers that are sufficiently decoupled to switch independently. In one embodiment the coupling is achieved by doping the spacer layer with a ferromagnetic material. Ruthenium (Ru), which is a preferred nonmagnetic material for spacer layers with cobalt (Co) being the preferred magnetic material. The weak ferromagnetic coupling can also be achieved through the use of platinum, palladium and alloys thereof for the spacer layer without the addition of a ferromagnetic element, but alternatively they can also be doped with ferromagnetic elements. For embodiments for perpendicular recording the spacer layer further can additionally comprise oxides of one or more elements selected from the group consisting of Si, Ta, Ti, Nb, Cr, V and B.