发明名称 |
Magnetic powder, method for producing the same and magnetic recording medium comprising the same |
摘要 |
A magnetic powder consisting of substantially spherical or ellipsoidal particles comprising a transition metal which comprises iron and a rear earth element which is mainly present in the outer layer of the magnetic powder particles, and having a particle size of 5 to 200 nm, a coercive force of 80 to 400 kA/m and a saturation magnetization of 10 to 25 uWb/g.
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申请公布号 |
US6964811(B2) |
申请公布日期 |
2005.11.15 |
申请号 |
US20030369657 |
申请日期 |
2003.02.21 |
申请人 |
HITACHI MAXELL, LTD. |
发明人 |
KISHIMOTO MIKIO;SASAKI YUJI;KITAHATA YUMIKO;WATANABE HIDEAKI |
分类号 |
G11B5/706;G11B5/712;G11B5/714;G11B5/716;H01F1/00;H01F1/055;H01F1/059;(IPC1-7):G11B5/706 |
主分类号 |
G11B5/706 |
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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