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METHOD FOR PRODUCING MAGNETIC POWDER FOR MAGNETIC RECORDING 发明申请

2023-10-02 3270 108K 0

专利信息

申请日期 2025-07-09 申请号 JP2007090806
公开(公告)号 JP2007246393A 公开(公告)日 2007-09-27
公开国别 JP 申请人省市代码 全国
申请人 DOWA HOLDINGS CO LTD
简介 PROBLEM TO BE SOLVED : To improve the properties of a magnetic powder for magnetic recording in order to obtain a magnetic recording medium suited for a high-sensitivity magnetic reading head using an MR element. SOLUTION : The magnetic powder for magnetic recording suited for an MR head comprises Fe-based acicular particles containing Co, Al, and R (rare earth metals including Y) in the following ranges : Co/Fe=10 to 50 at.%, dissolved Al/(Fe+Co)=5 to 50 at.%, and R/(Fe+Co)=2 to 25 at.%, having an oxygen content of at most 25 wt.%, and having an average major axis diameter of 25 to 80 nm and a saturation magnetization σs of 10 to 130 emu/g. COPYRIGHT : (C)2007, JPO&INPIT


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