公开(公告)号：EP0179466A3

公开(公告)日：1987-08-12

申请号：EP85113478

申请日：1985-10-23

申请人： Research Development Corporation of Japan ,  Suzuki, Kenji ,  Masumoto, Tsuyoshi ,  Ota, Nobuhiro ,  Mitera, Masao ,  Matsumoto, Akira ,  Masuda, Shuji

发明人： Suzuki, Kenji ,  Masumoto, Tsuyoshi ,  Ota, Nobuhiro ,  Okubo, Mika ,  Mitera, Masao ,  Matsumoto, Akira ,  Masuda, Shuji

IPC分类号： H01F01/34

CPC分类号： H01F10/20 ,  H01F1/38

摘要： This invention provides an amorphous ferromagnetic oxide represented by the formula
wherein A represents at least one of Bi 2 O 3' V 2 O 5 , TeO, and GeO 2 ; M represents at least one of Mn, Fe, Co, Ni, Cu, Mg, Zn, Cd, Ca, Pb, Ba. Sr and rare earth elements; when M is not a rare earth element, m=1 and n=1; when M is earth element, m= 2 and n=3; 0

公开(公告)号：EP0179466A2

公开(公告)日：1986-04-30

申请号：EP85113478.3

申请日：1985-10-23

申请人： Research Development Corporation of Japan ,  OTSUKA KAGAKU KABUSHIKI KAISHA ,  Mitera, Masao ,  NIKON CORPORATION

发明人： Suzuki, Kenji ,  Masumoto, Tsuyoshi ,  Ota, Nobuhiro ,  Okubo, Mika ,  Mitera, Masao ,  Matsumoto, Akira ,  Masuda, Shuji

IPC分类号： H01F1/34

CPC分类号： H01F10/20 ,  H01F1/38

摘要： This invention provides an amorphous ferromagnetic oxide represented by the formula
wherein A represents at least one of Bi 2 O 3' V 2 O 5 , TeO, and GeO 2 ; M represents at least one of Mn, Fe, Co, Ni, Cu, Mg, Zn, Cd, Ca, Pb, Ba. Sr and rare earth elements; when M is not a rare earth element, m=1 and n=1; when M is earth element, m= 2 and n=3; 0

公开(公告)号：EP0179466B1

公开(公告)日：1991-02-20

申请号：EP85113478.3

申请日：1985-10-23

申请人： Research Development Corporation of Japan ,  OTSUKA KAGAKU KABUSHIKI KAISHA ,  Mitera, Masao ,  NIKON CORPORATION

发明人： Suzuki, Kenji ,  Masumoto, Tsuyoshi ,  Ota, Nobuhiro ,  Okubo, Mika ,  Mitera, Masao ,  Matsumoto, Akira ,  Masuda, Shuji

IPC分类号： H01F1/34

CPC分类号： H01F10/20 ,  H01F1/38

公开(公告)号：EP0160214B1

公开(公告)日：1989-08-02

申请号：EP85103601.2

申请日：1985-03-26

申请人： Research Development Corporation of Japan ,  MITSUBISHI ELECTRIC CORPORATION ,  SONY CORPORATION ,  OTSUKA CHEMICAL COMPANY, LIMITED

发明人： Watarai, Hisao ,  Tanaka, Masahiro ,  Masuda, Shuji ,  Suzuki, Kenji ,  Masumoto, Tsuyoshi

IPC分类号： G11B7/24

CPC分类号： G11B7/243 ,  G11B7/00454 ,  G11B2007/24306 ,  G11B2007/24312 ,  G11B2007/2432 ,  G11C13/04 ,  Y10S428/913 ,  Y10S430/146 ,  Y10S430/165

公开(公告)号：EP0160214A1

公开(公告)日：1985-11-06

申请号：EP85103601.2

申请日：1985-03-26

申请人： Research Development Corporation of Japan ,  MITSUBISHI ELECTRIC CORPORATION ,  SONY CORPORATION ,  OTSUKA CHEMICAL COMPANY, LIMITED

发明人： Watarai, Hisao ,  Tanaka, Masahiro ,  Masuda, Shuji ,  Suzuki, Kenji ,  Masumoto, Tsuyoshi

IPC分类号： G11B7/24

CPC分类号： G11B7/243 ,  G11B7/00454 ,  G11B2007/24306 ,  G11B2007/24312 ,  G11B2007/2432 ,  G11C13/04 ,  Y10S428/913 ,  Y10S430/146 ,  Y10S430/165

摘要： A recording medium is disclosed, which comprises as the main component an amorphous lead oxide or a lead oxide at the metastable state, having the formula PbL X M Y O z ' wherein L is Fe, Co or Ni and M is Nb or Ta. The recording mediums are drastically changed in their electrical and optical properties by application of heat, due to the characteristics inherent in the main component, and such changes make the recording medium highly useful for recording by laser light or heat.