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公开(公告)号：BR8801120A
公开(公告)日：1988-10-18
申请号：BR8801120
申请日：1988-03-11
Applicant: IBM
Inventor： BEYERS ROBERT BRUCE , ENGLER EDWARD MARTIN , GRANT PAUL MICHAEL , LIM GRACE SU , PARKIN STUART STEPHEN PAPWORTH
Abstract: Compositions having the formula A1+/-xM2+/-xCu3Oy, wherein A is Y, or a combination of Y La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800 DEG C and about 1100 DEG C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.
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公开(公告)号：DE3781712T2
公开(公告)日：1993-04-01
申请号：DE3781712
申请日：1987-02-24
Applicant: IBM
Inventor： AHLERT RICHARD HENRY , HOWARD JAMES KENT , LIM GRACE SU
Abstract: A magnetic recording medium is formed by depositing a layer of a cobalt-platinum magnetic alloy (which may also contain chromium) on a non-magnetic underlayer consisting of tungsten, molybdenum, niobium or vanadium. The magnetic alloy has a higher coercivity than when deposited on a chromium underlayer. The coercivity of the magnetic alloy becomes even higher when the substrate is maintained within such a temperature range during deposition of the magnetic alloy that an intermetallic compound of cobalt and the metal of the underlayer is formed at the interface between the magnetic alloy layer and the underlayer.
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公开(公告)号：DE3780347T2
公开(公告)日：1993-03-04
申请号：DE3780347
申请日：1987-04-22
Applicant: IBM
Inventor： AHLERT RICHARD HENRY , HOWARD JAMES KENT , LIM GRACE SU
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公开(公告)号：GB2201955B
公开(公告)日：1991-09-18
申请号：GB8801770
申请日：1988-01-15
Applicant: IBM
Inventor： BEYERS ROBERT BRUCE , ENGLER EDWARD MARTIN , GRANT PAUL MICHAEL , LIM GRACE SU , PARKIN STUART STEPHEN PAPWORTH
Abstract: Compositions having the formula A1+/-xM2+/-xCu3Oy, wherein A is Y, or a combination of Y La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800 DEG C and about 1100 DEG C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.
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公开(公告)号：GB2201955A
公开(公告)日：1988-09-14
申请号：GB8801770
申请日：1988-01-15
Applicant: IBM
Inventor： BEYERS ROBERT BRUCE , ENGLER EDWARD MARTIN , GRANT PAUL MICHAEL , LIM GRACE SU , PARKIN STUART STEPHEN PAPWORTH
Abstract: Compositions having the formula A1+/-xM2+/-xCu3Oy, wherein A is Y, or a combination of Y La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800 DEG C and about 1100 DEG C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.
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Patent Agency Ranking
公开(公告)号：HK1004302A1
公开(公告)日：1998-11-20
申请号：HK98103445
申请日：1998-04-24
Applicant: IBM
Inventor： BEYERS ROBERT BRUCE , ENGLER EDWARD MARTIN , GRANT PAUL MICHAEL , LIM GRACE SU , PARKIN STUART STEPHEN PAPWORTH
IPC: C01G1/00 , C01G3/00 , C04B35/00 , C04B35/45 , H01B12/00 , H01B13/00 , H01L39/12 , H01L39/24 , H01L , C04B , C01G
Abstract: Compositions having the formula A1+/-xM2+/-xCu3Oy, wherein A is Y, or a combination of Y La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800 DEG C and about 1100 DEG C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.
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公开(公告)号：DE3781712D1
公开(公告)日：1992-10-22
申请号：DE3781712
申请日：1987-02-24
Applicant: IBM
Inventor： AHLERT RICHARD HENRY , HOWARD JAMES KENT , LIM GRACE SU
Abstract: A magnetic recording medium is formed by depositing a layer of a cobalt-platinum magnetic alloy (which may also contain chromium) on a non-magnetic underlayer consisting of tungsten, molybdenum, niobium or vanadium. The magnetic alloy has a higher coercivity than when deposited on a chromium underlayer. The coercivity of the magnetic alloy becomes even higher when the substrate is maintained within such a temperature range during deposition of the magnetic alloy that an intermetallic compound of cobalt and the metal of the underlayer is formed at the interface between the magnetic alloy layer and the underlayer.
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公开(公告)号：HK34092A
公开(公告)日：1992-05-15
申请号：HK34092
申请日：1992-05-07
Applicant: IBM
Inventor： BEYERS ROBERT BRUCE , ENGLER EDWARD MARTIN , GRANT PAUL MICHAEL , LIM GRACE SU , PARKIN STUART STEPHEN PAPWORTH
Abstract: Compositions having the formula A1+/-xM2+/-xCu3Oy, wherein A is Y, or a combination of Y La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800 DEG C and about 1100 DEG C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.
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公开(公告)号：DE3675845D1
公开(公告)日：1991-01-10
申请号：DE3675845
申请日：1986-07-25
Applicant: IBM
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公开(公告)号：DE3888217T2
公开(公告)日：1994-09-22
申请号：DE3888217
申请日：1988-01-29
Applicant: IBM
Inventor： BEYERS ROBERT BRUCE , ENGLER EDWARD MARTIN , GRANT PAUL MICHAEL , LIM GRACE SU , PARKIN STUART STEPHEN PAPWORTH
Abstract: Compositions having the formula A1+/-xM2+/-xCu3Oy, wherein A is Y, or a combination of Y La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800 DEG C and about 1100 DEG C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.
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