公开(公告)号：US5789088A

公开(公告)日：1998-08-04

申请号：US427874

申请日：1995-04-26

申请人： Junichi Nakai ,  Kazuo Yoshikawa ,  Eisuke Kusumoto ,  Hiromi Matsumura ,  Takashi Miyamoto

发明人： Junichi Nakai ,  Kazuo Yoshikawa ,  Eisuke Kusumoto ,  Hiromi Matsumura ,  Takashi Miyamoto

IPC分类号： G11B5/64 ,  G11B5/73

CPC分类号： G11B5/7325 ,  G11B5/656 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/12861 ,  Y10T428/31678

摘要： Disclosed is magnetic recording media having a high coercivity sufficient to cope with the recent high density recording, low noise property and excellent squareness, and a target for forming a magnetic film useful for realizing the magnetic recording media. The magnetic film is made of a Co based alloy containing: Cr in an amount of 8-18 atomic %; one kind or more of elements selected from a group consisting of V, Mo and W in an amount of 3-10 atomic %, or one kind or more of the elements and Ta in an amount of 3-10 atomic %; Pt in an amount of 0.5 to 20 atomic % or Ni in an amount of 5-30 atomic %, as needed; and the balance being Co and inevitable impurities, wherein the total content of Cr and one kind or more of the elements selected from a group consisting of V, Mo and W, or of Cr and one kind or more of the elements and Ta is specified to be 24 atomic % or less. A target for forming the magnetic film is formed by melting, casting and hot-rolling the Co alloy having the above composition, and it has a maximum permeability of 100 or less.

摘要翻译： 公开了具有足以应付近来的高密度记录，低噪声特性和优异的矩形度的高矫顽力的磁记录介质，以及用于形成用于实现磁记录介质的磁膜的目标。 磁性膜由含有8〜18原子％的Cr的Co系合金构成。 选自含量为3-10原子％的V，Mo和W的元素中的一种或多种元素，或者一种或多种元素，Ta为3-10原子％的量; 根据需要的量为0.5〜20原子％的Pt或5-30原子％的Ni; 其余为Co和不可避免的杂质，其中规定Cr和选自由V，Mo和W组成的组中的一种或多种元素，或Cr和一种或多种元素和Ta的元素的总含量 为24原子％以下。 通过熔融，铸造和热轧具有上述组成的Co合金来形成磁性膜的目标，并且其最大磁导率为100以下。