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    • 6. 发明授权
    • Magneto-optical recording medium having intermediate layer of in plane magnetization
    • 具有平面磁化中间层的磁光记录介质
    • US06272077B1
    • 2001-08-07
    • US09479256
    • 2000-01-07
    • Akira TakahashiMichinobu MiedaNaoyasu IketaniGo MoriJunsaku NakajimaYoshiteru MurakamiJunji Hirokane
    • Akira TakahashiMichinobu MiedaNaoyasu IketaniGo MoriJunsaku NakajimaYoshiteru MurakamiJunji Hirokane
    • G11B1110
    • G11B11/10584G11B11/10515G11B11/10586G11B11/10593
    • A magneto-optical memory medium according to the present invention comprises a reproducing layer, which has in-plane magnetization at room temperature and perpendicular magnetization when heated to above a predetermined temperature by a reproducing light beam; a recording layer, which is magnetostatically coupled to the reproducing layer; and an in-plane magnetized layer, provided adjacent to the recording layer, which has a Curie temperature at the above-mentioned predetermined temperature. In this medium, at temperatures below the predetermined temperature, signals recorded at high density in the recording layer are masked, and the above-mentioned magnetostatic coupling is suppressed, by magnetic masking by the in-plane magnetized layer. At temperatures above the predetermined temperature, however, within a domain forming part of the in-plane magnetized layer, the recording layer and the reproducing layer are magnetostatically coupled, and a recording bit of the recording layer is copied and expanded to a magnetic domain in the reproducing layer. Accordingly, with this medium, by reproducing from an expanded magnetic domain of the reproducing layer, even information from recording bits recorded at high density can be reproduced with high signal quality.
    • 根据本发明的磁光存储介质包括再现层,其在室温下具有面内磁化并且通过再现光束被加热到高于预定温度时的垂直磁化; 记录层,其被静磁耦合到再现层; 以及与记录层相邻的面内磁化层,居里温度在上述预定温度。 在该介质中,在低于预定温度的温度下,记录层中以高密度记录的信号被屏蔽,并且通过面内磁化层的磁屏蔽来抑制上述静磁耦合。 然而,在高于预定温度的温度下,在形成面内磁化层的一部分的区域内,磁静电耦合记录层和再现层,并且将记录层的记录位复制并扩展到磁畴中 再现层。 因此,利用该介质,通过从再现层的扩展磁畴再现,可以以高信号质量再现以高密度记录的记录位的信息。
    • 7. 发明授权
    • Magneto-optical recording medium having intermediate layer of in-plane
magnetization
    • 具有平面内磁化中间层的磁光记录介质
    • US06147939A
    • 2000-11-14
    • US32985
    • 1998-03-02
    • Akira TakahashiMichinobu MiedaNaoyasu IketaniGo MoriJunsaku NakajimaYoshiteru MurakamiJunji Hirokane
    • Akira TakahashiMichinobu MiedaNaoyasu IketaniGo MoriJunsaku NakajimaYoshiteru MurakamiJunji Hirokane
    • G11B11/105G11B11/00
    • G11B11/10584G11B11/10515G11B11/10586G11B11/10593
    • A magneto-optical memory medium according to the present invention comprises a reproducing layer, which has in-plane magnetization at room temperature and perpendicular magnetization when heated to above a predetermined temperature by a reproducing light beam; a recording layer, which is magnetostatically coupled to the reproducing layer; and an in-plane magnetized layer, provided adjacent to the recording layer, which has a Curie temperature at the above-mentioned predetermined temperature. In this medium, at temperatures below the predetermined temperature, signals recorded at high density in the recording layer are masked, and the above-mentioned magnetostatic coupling is suppressed, by magnetic masking by the in-plane magnetized layer. At temperatures above the predetermined temperature, however, within a domain forming part of the in-plane magnetized layer, the recording layer and the reproducing layer are magnetostatically coupled, and a recording bit of the recording layer is copied and expanded to a magnetic domain in the reproducing layer. Accordingly, with this medium, by reproducing from an expanded magnetic domain of the reproducing layer, even information from recording bits recorded at high density can be reproduced with high signal quality.
    • 根据本发明的磁光存储介质包括再现层,其在室温下具有面内磁化并且通过再现光束被加热到高于预定温度时的垂直磁化; 记录层,其被静磁耦合到再现层; 以及与记录层相邻的面内磁化层,居里温度在上述预定温度。 在该介质中,在低于预定温度的温度下,记录层中以高密度记录的信号被屏蔽,并且通过面内磁化层的磁屏蔽来抑制上述静磁耦合。 然而,在高于预定温度的温度下,在形成面内磁化层的一部分的区域内,磁静电耦合记录层和再现层,并且将记录层的记录位复制并扩展到磁畴中 再现层。 因此,利用该介质,通过从再现层的扩展磁畴再现,可以以高信号质量再现以高密度记录的记录位的信息。