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    Magneto-optisches Speichermedium mit Doppelmaskierung
    3.
    发明公开
    Magneto-optisches Speichermedium mit Doppelmaskierung 有权
    双掩蔽的磁光存储介质

    公开(公告)号：EP0974962A3

    公开(公告)日：2002-07-31

    申请号：EP99201947.1

    申请日：1999-06-18

    申请人： Philips Corporate Intellectual Property GmbH ,  Koninklijke Philips Electronics N.V.

    发明人： Becker, Stephan, Dr.

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10586 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10521 ,  G11B11/10584 ,  Y10S428/90 ,  Y10S428/928

    摘要： Ein magneto-optisches Speichermedium zum mehrfachen Schreiben von Informationen bei einer Schreibtemperatur T w oder zwei Schreibtemperaturen T h , T l oberhalb der Raumtemperatur T a und zum mehrfachen Lesen bei einer Temperatur T m mit einer Frontmaskierung bei der Temperatur T f und einer Rückmaskierung bei einer Temperatur T r oberhalb der Raumtemperatur T a in einem externen Magnetfeld H e , das ein Substrat, eine auf dem Substrat angeordneten ersten magnetischen Schicht mit einer temperaturabhängigen Koerzitivfeldstärke H C1 (T), der Kompensationstemperatur T cp1 und der Curie-Temperatur T C1 , eine auf der ersten magnetischen Schicht angeordneten zweiten magnetischen Schicht, einer temperaturabhängigen Koerzitivfeldstärke H C2 (T), der Kompensationstemperatur T cp2 und der Curie-Temperatur T C2 , und eine auf der zweiten magnetischen Schicht angeordneten dritten magnetischen Schicht, mit einer temperaturabhängigen Koerzitivfeldstärke H C3 (T), der Kompensationstemperatur T cp3 und der Curie-Temperatur T C3 umfaßt, wobei gilt:Ta He für T

    MAGNETO-OPTICAL RECORDING MEDIUM, ITS REPRODUCING METHOD AND REPRODUCER
    6.
    发明公开
    MAGNETO-OPTICAL RECORDING MEDIUM, ITS REPRODUCING METHOD AND REPRODUCER 失效
    澳大利亚新泽西州，吉尔吉斯斯坦州的MAGNETOOPTISCHES WIEDERGABEVERFAHREN- UNDGERÄT

    公开(公告)号：EP0913818A1

    公开(公告)日：1999-05-06

    申请号：EP97930771.7

    申请日：1997-07-11

    申请人： HITACHI MAXELL, LTD. ,  SANYO ELECTRIC Co., Ltd.

    发明人： OONUKI, Satoru ,  YOSHIHIRO, Masafumi ,  NAGAI, Nobuyuki ,  SHIMAZAKI, Katsusuke ,  AWANO, Hiroyuki ,  SHIRAI, Hiroshi ,  OHTA, Norio ,  SUMI, Satoshi ,  YAMAGUCHI, Atsushi

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10515 ,  G11B7/00745 ,  G11B11/10508 ,  G11B11/10521 ,  G11B11/10528 ,  G11B11/10578 ,  G11B11/10584 ,  G11B11/10593 ,  G11B11/10595 ,  G11B27/19 ,  G11B27/3027

    摘要： A magneto-optical recording medium (11) has a second auxiliary magnetic film (4), a first auxiliary magnetic film (5) and a magneto-optical recording film (6) in this order from the laser beam applied side. If the temperatures of the first and second auxiliary magnetic films (4 and 5) exceed their critical temperatures T CR1 and T CR2 , the magnetization of the auxiliary magnetic films is changed from the surface magnetization to the vertical magnetization. The Curie points T C0 , T C1 and T C2 of the magneto-optical recording film (6), the first auxiliary magnetic film (4) and the second auxiliary magnetic film (5) and the critical temperatures T CR1 and T CR2 satisfy the relations room temperature CR2 CR1 C0 , T C1 and T C2 . The thickness of the first auxiliary magnetic film (4) is larger than the tickness of a magnetic wall. After the recording magnetic domain (22) of the magneto-optical recording film (6) is contracted and transferred onto the first auxiliary magnetic film (4) by the reproducing light application, it is expanded and transferred onto the second auxiliary magnetic film (5). Since an amplified reproducing signal can be obtained from an expanded magnetic domain (23), the magneto-optical recording medium is suitable for the reproduction of the high density recording.

    摘要翻译： 从激光束施加侧起，磁光记录介质（11）具有第二辅助磁膜（4），第一辅助磁膜（5）和磁光记录膜（6）。 如果第一和第二辅助磁性膜（4和5）的温度超过它们的临界温度TCR1和TCR2，则辅助磁性膜的磁化从表面磁化转变为垂直磁化。 磁光记录膜（6），第一辅助磁性膜（4）和第二辅助磁性膜（5）的居里点TC0，TC1和TC2以及临界温度TCR1和TCR2满足室温

    Thermomagnetic recording method
    7.
    发明公开
    Thermomagnetic recording method 失效
    Verfahren zur thermomagnetischen Aufzeichnung

    公开(公告)号：EP0901121A2

    公开(公告)日：1999-03-10

    申请号：EP98122628.5

    申请日：1989-07-12

    申请人： SONY CORPORATION

    发明人： Kaneko,Masahiko, Sony Corporation ,  Aratani,Katsuhisa, Sony Corporation ,  Muto, Yoshihiro, Sony Corporation

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10586 ,  G11B11/10506 ,  G11B11/10519 ,  G11B11/10521 ,  G11B11/10523 ,  G11B11/10528

    摘要： The present invention relates to a thermomagnetic recording method using a thermomagnetic recording medium formed in a laminated structure of, at least, first and second magnetic thin films (11, 12, 13) each having perpendicular magnetic anisotropy, wherein said second magnetic thin film (12) is formed of first and second component films (12 1 , 12 2 ) laminated to each other by exchange coupling, said first and second component films (12 1 , 12 2 ) having characteristics H C21R > H C22R and T C21 C22 , H C21R and H C22R representing coercive forces of said first and second component films (12 1 , 12 2 ) at room temperature and T C21 and T C22 representing the Curie temperatures of the same. This method comprises the steps of: modulating a first heating condition to heat the medium to a first temperature T 1 being virtually in the vicinity of the Curie temperature T C1 of said first magnetic thin film (11) and not causing reversal of the magnetic moment in said second magnetic thin film (12) and a second heating condition to heat the medium to a second temperature T 2 being over said Curie temperature T C1 and sufficient to cause reversal of the magnetic moment in said second magnetic thin film (12) in accordance with an information signal to be recorded, and adapting in the course of the medium cooling down from the first and second heated states such that the magnetic moments within said second magnetic thin film (12) are brought into the same state.

    摘要翻译： 本发明涉及使用形成在至少具有垂直磁各向异性的至少第一和第二磁性薄膜（11,12,13）的叠层结构中的热磁记录介质的热磁记录方法，其中所述第二磁性薄膜 12）由通过交换耦合彼此层叠的第一和第二组分膜（121,122）形成，具有HC21R> HC22R和TC21

    Magnetooptical recording medium using a magnetic phase transformation material and a recording method using the medium
    8.
    发明公开
    Magnetooptical recording medium using a magnetic phase transformation material and a recording method using the medium 失效
    使用的磁性的磁 - 光记录介质，phasentransformierendes利用介质材料和记录处理

    公开(公告)号：EP0780841A2

    公开(公告)日：1997-06-25

    申请号：EP96309184.8

    申请日：1996-12-17

    申请人： CANON KABUSHIKI KAISHA

    发明人： Hiramatsu, Makoto

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10584 ,  G11B11/10506 ,  G11B11/10521

    摘要： A magnetooptical recording medium includes a memory layer (1113) having an out of plane preferred direction of magnetization and an initializing layer (1117) having a magnetization in a predetermined direction perpendicular to the layer. An intermediate layer (1115) is interposed between the memory layer (1113) and the initializing layer (1117), the intermediate layer (1115) having a phase transformation from antiferromagnetic to ferromagnetic at temperature T1 for rising temperatures, and a phase transformation from ferromagnetic to antiferromagnetic at temperature T2 for declining temperatures. The temperatures T1, T2 and the Curie temperatures of the memory layer (1113) T c1 , and the initializing layer (1117) T c3 have the following relationship: T2 c1 c3 .

    摘要翻译： 的磁光记录介质包括具有磁化和初始化具有垂直于预定的层的方向上的磁化层（1117）的外的平面优选方向的存储层（1113）。 中间层（1115）设置在存储层（1113）和初始化层（1117），其具有从反铁磁性到铁磁性在温度T1下一个相转变在温度上升的中间层（1115），并从铁磁相变之间 到反铁磁性在温度T2为温度下降。 的温度T1，T2和存储层（1113）Tc1的，并且初始化层（1117）的居里温度c3分别具有以下关系：T2