发明名称 |
LAMINATED MAGNETIC RECORDING MEDIA |
摘要 |
<p>A laminated magnetic recording medium for data storage uses a magnetic recording layer having at least two antiferromagnetically-coupled (AFC) layers spaced apart by a nonferromagnetic spacer layer. Each AFC layer is formed as two ferromagnetic films antiferromagnetically coupled together across an antiferromagnetically coupling film that has a composition and thickness to induce antiferromagnetic coupling of the second film to the first film. The magnetic moments of the two antiferromagnetically-coupled films in each AFC layer are oriented antiparallel, and thus the net remanent magnetization-thickness product (Mrt) of each AFC layer is the difference in the Mrt values of the two ferromagnetic films. The nonferromagnetic spacer layer between neighboring AFC layers has a composition and thickness to prevent any antiferromagnetic coupling of the ferromagnetic films of one AFC layer with the ferromagnetic films of the neighboring AFC layer.</p> |
申请公布号 |
EP1305796(B1) |
申请公布日期 |
2004.03.24 |
申请号 |
EP20010947653 |
申请日期 |
2001.07.06 |
申请人 |
HITACHI GLOBAL STORAGE TECH |
发明人 |
VAN DO HOA;FULLERTON ERIC EDWARD;MARGULIES DAVID THOMAS;ROSEN HAL JERVIS |
分类号 |
G11B5/65;C23C28/00;C23C28/02;G11B5/64;G11B5/66;G11B5/673;G11B5/708;G11B5/738;H01F10/26;(IPC1-7):G11B5/66 |
主分类号 |
G11B5/65 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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