发明名称 |
Perpendicular magnetic recording medium |
摘要 |
To ensure that a perpendicular magnetic recording medium having a granular magnetic recording layer made of CoCrPt alloy and Si oxide provides both high SNR and thermal stability. A substantially amorphous grain boundary layer of a magnetic recording layer made of CoCrPt alloy and Si oxide contains a ferromagnetic element in a concentration from 30at.% to 50at.% or more preferably from 35at.% to 47at.% so that intergrain exchange interaction takes place moderately. As a consequence, SNR of 18 dB or more and thermal stability of 3%/decade or less are achieved.
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申请公布号 |
EP1653451(A1) |
申请公布日期 |
2006.05.03 |
申请号 |
EP20050107114 |
申请日期 |
2005.08.02 |
申请人 |
HITACHI GLOBAL STORAGE TECHNOLOGIES B. V. |
发明人 |
TAKAHASHI, YOSHIO;NAKAMURA, ATUSHI;HOSOE, YUZURU |
分类号 |
G11B5/64 |
主分类号 |
G11B5/64 |
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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