Magnetic recording medium
    1.
    发明公开
    Magnetic recording medium 审中-公开
    磁记录介质

    公开(公告)号:EP0910068A1

    公开(公告)日:1999-04-21

    申请号:EP98307857.7

    申请日:1998-09-28

    申请人: TODA KOGYO CORP.

    IPC分类号: G11B5/64 G11B5/84

    摘要: A magnetic recording medium comprises:

    a substrate; and
    a cobalt-containing maghemite film which is provided on said substrate, which contains cobalt at a molar ratio of cobalt to iron of not more than 0.06:1, which has a spacing of a (311) plane of not more than 0.2510 nm (2.510Å), a spacing of a (222) plane of not more than 0.2415 nm (2.415Å) or a spacing of a (220) plane of not more than 0.2950 nm (2.950Å), and which has a coercive force of not less than 143 kA/m (1,800 Oe).

    摘要翻译: 一种磁记录介质,包括:衬底; 以及设置在所述基板上的含钴磁赤铁矿膜,所述含钴磁赤铁矿膜以钴和铁的摩尔比为0.06:1以下的方式含有钴,其(311)面的间隔不大于0.2510nm( (222)面的间隔不大于0.2415nm(2.415)或(220)面的间距不大于0.2950nm(2.950),并且其矫顽力不是 小于143 kA / m(1,800 Oe)。

    Magnetic recording medium and process for producing the same
    6.
    发明公开
    Magnetic recording medium and process for producing the same 审中-公开
    磁记录介质及其制造方法

    公开(公告)号:EP0944043A3

    公开(公告)日:1999-10-13

    申请号:EP99302151.8

    申请日:1999-03-19

    申请人: TODA KOGYO CORP.

    IPC分类号: G11B5/64

    摘要: A magnetic recording medium suitably applicable to existent magnetic recording systems using a ring-type magnetic head and capable of using a plastic substrate for providing a magnetic recording medium for high-density recording, which magnetic recording medium has a coercive force of not less than 159 kA/m (2,000 Oe) and comprises:
    (a) a plastic substrate; and (b) a cobalt-containing maghemite film on the substrate; wherein the film has:
    a molar ratio of cobalt to iron of not more than 0.06:1; and a spacing of a plane (311) of not more than 0.2510 nm (2.510Å), a spacing of a plane (222) of not more than 0.2415 nm (2.415Å) or a spacing of a plane (220) of not more than 0.2950 nm (2.950Å).

    摘要翻译: 一种磁记录介质,适用于使用环形磁头的现有磁记录系统,并且能够使用塑料基片来提供用于高密度记录的磁记录介质,该磁记录介质具有不小于159的矫顽力 kA / m(2000 Oe)并且包括:(a)塑料基材; 和(b)在基底上的含钴磁赤铁矿膜; 其中所述膜具有:钴与铁的摩尔比不大于0.06:1; 并且平面(311)的间距不大于0.2510nm(2.510),平面(222)的间距不大于0.2415nm(2.415),或者平面(220)的间隔不大于 超过0.2950nm(2.950)。

    Magnetic recording medium
    7.
    发明公开
    Magnetic recording medium 有权
    磁记录介质

    公开(公告)号:EP0907162A1

    公开(公告)日:1999-04-07

    申请号:EP98307841.1

    申请日:1998-09-28

    申请人: TODA KOGYO CORP.

    IPC分类号: G11B5/64 G11B5/66

    摘要: A magnetic recording medium comprises:

    a substrate;
    a nickel oxide underlayer on said substrate; and
    a cobalt-containing maghemite film which is provided on said nickel oxide underlayer, which has a spacing of a (311) plane of not more than 0.2510 nm (2.510Å), a spacing of a (222) plane of not more than 0.2415 nm (2.415Å) or a spacing of a (220) plane of not more than 0.2950 nm (2.950Å), and in which the ratio of the X-ray diffraction spectrum peak intensity of the (311), (222) or (220) plane of the said film to the X-ray diffraction spectrum peak intensity of the (400) plane is more than 0.5:1.

    摘要翻译: 一种磁记录介质,包括:衬底; 在所述衬底上的氧化镍底层; 以及设置在所述氧化镍底层上的含钴磁赤铁矿膜,所述氧化镍底层的(311)面的间距不大于0.2510nm(2.510),(222)面的间距不大于0.2415 (211),(222)或(220)面的X射线衍射光谱峰值强度之比为0.2950nm(2.950)以下, 220)面与所述(400)面的X射线衍射谱峰值强度之比大于0.5:1。

    Magnetic recording medium and process for producing the same
    9.
    发明公开
    Magnetic recording medium and process for producing the same 审中-公开
    磁记录介质及其制造方法

    公开(公告)号:EP0949608A1

    公开(公告)日:1999-10-13

    申请号:EP99302150.0

    申请日:1999-03-19

    申请人: TODA KOGYO CORP.

    IPC分类号: G11B5/64 G11B5/84 G11B5/706

    摘要: A magnetic recording medium suitably applicable to existent magnetic recording systems using a ring-type magnetic head and capable of using a plastic substrate for providing a magnetic recording medium for high-density recording,which magnetic recording medium comprises:

    (a) a plastic substrate;
    (b) a nickel oxide layer on the substrate; and
    (c) a cobalt-containing maghemite film on the nickel oxide layer, which film has a molar ratio of cobalt to iron of from 0.01:1 to 0.1:1, a spacing of a plane (311) of not more than 0.2510 nm (2.510 Å), a spacing of a plane (222)of not more than 0.2415 nm (2.415 Å), or a spacing of a plane (220) of not more than 0.2950 nm (2.950 Å), and a ratio of more than 0.5:1 in respect of the X-ray diffraction pattern peak intensity of either of the planes (311), (222) and (220) of said film to the X-ray diffraction pattern peak intensity of a plane (400).

    摘要翻译: 一种磁记录介质,适用于使用环形磁头的现有磁记录系统,并且能够使用塑料基片来提供用于高密度记录的磁记录介质,该磁记录介质包括:(a)塑料基片; (b)衬底上的氧化镍层; 和(c)氧化镍层上的含钴磁赤铁矿膜,所述膜具有0.01:1至0.1:1的钴与铁的摩尔比,平面(311)的间距不超过0.2510nm (2.510?),平面(222)的间距不大于0.2415nm(2.415?),或平面(220)的间距不大于0.2950nm(2.950?),并且多于 对于所述膜的平面(311),(222)和(220)中的任一个的X射线衍射图案峰值强度与平面(400)的X射线衍射图案峰值强度之比为0.5:1。

    Magnetic recording medium and process for producing the same
    10.
    发明公开
    Magnetic recording medium and process for producing the same 审中-公开
    MagnetischerAufzeichnungsträgersowie Verfahren zu seiner Herstellung

    公开(公告)号:EP0944043A2

    公开(公告)日:1999-09-22

    申请号:EP99302151.8

    申请日:1999-03-19

    申请人: TODA KOGYO CORP.

    IPC分类号: G11B5/64

    摘要: A magnetic recording medium suitably applicable to existent magnetic recording systems using a ring-type magnetic head and capable of using a plastic substrate for providing a magnetic recording medium for high-density recording, which magnetic recording medium has a coercive force of not less than 159 kA/m (2,000 Oe) and comprises:

    (a) a plastic substrate; and
    (b) a cobalt-containing maghemite film on the substrate; wherein the film has:

    a molar ratio of cobalt to iron of not more than 0.06:1; and
    a spacing of a plane (311) of not more than 0.2510 nm (2.510Å), a spacing of a plane (222) of not more than 0.2415 nm (2.415Å) or a spacing of a plane (220) of not more than 0.2950 nm (2.950Å).

    摘要翻译: 一种磁记录介质,适用于使用环型磁头的现有磁记录系统,并且能够使用塑料基板提供用于高密度记录的磁记录介质,该磁记录介质具有不小于159的矫顽力 kA / m(2,000Oe),包括:(a)塑料基材; 和(b)在基材上的含钴的磁赤铁矿膜; 其中所述膜具有:不超过0.06:1的钴与铁的摩尔比; 并且平面(311)的间距不大于0.2510nm(2.510安格姆),平面(222)的间距不大于0.2415纳米(2.415安)或不超过平面(220)的间距 大于0.2950 nm(2.950 ANGSTROM)。 一世