公开(公告)号：EP0087559B1

公开(公告)日：1986-08-13

申请号：EP83100209.2

申请日：1983-01-12

申请人： Hitachi, Ltd.

发明人： Kitada, Masahiro ,  Yamamoto, Hiroshi ,  Suenaga, Masahide ,  Shimizu, Noboru

IPC分类号： H01F10/16 ,  G11B5/62 ,  C22C19/07 ,  C22C5/04

CPC分类号： H01F41/18 ,  C22C19/07 ,  G11B5/66 ,  H01F10/16 ,  Y10T428/115

公开(公告)号：EP0087559A1

公开(公告)日：1983-09-07

申请号：EP83100209.2

申请日：1983-01-12

申请人： Hitachi, Ltd.

发明人： Kitada, Masahiro ,  Yamamoto, Hiroshi ,  Suenaga, Masahide ,  Shimizu, Noboru

IPC分类号： H01F10/16 ,  G11B5/62 ,  C22C19/07 ,  C22C5/04

CPC分类号： H01F41/18 ,  C22C19/07 ,  G11B5/66 ,  H01F10/16 ,  Y10T428/115

摘要： thin-film permanent magnet which is made of a Co - Pt alloy containing 5 - 35 atomic-% of Pt. This thin-film permanent magnet can be readily produced by a sputtering method in which the ultimate pressure before the introduction of a sputtering gas is made 5 x 10 -7 - 1 x 10 -4 Torr. Without any heat treatment, it has a coercivity of 2,000 Oe at the maximum and a remanence of about 8,000 - about 18,000 G.