Magnetic storage medium having a high recording density
    3.
    发明授权
    Magnetic storage medium having a high recording density 失效
    具有高记录密度的磁存储介质

    公开(公告)号:US06682834B2

    公开(公告)日:2004-01-27

    申请号:US09805415

    申请日:2001-03-13

    IPC分类号: G11B368

    CPC分类号: G11B5/656 G11B5/66

    摘要: A magnetic storage medium includes a magnetic layer of a Co alloy of a system Co—Cr—Pt—B—Cu, wherein the magnetic layer has a thickness t and a remnant magnetic flux density Br satisfying a relationship (t×Br) 2.0 nT·m≦(t×Br)≦7.0 nT·m, wherein the Co alloy contains, in addition to Co, Cr with a concentration &bgr; of 20-26 at % (20 at %≦&bgr;≦26 at %), Pt with a concentration &ggr; of 6-20 at % (6 at %≦&ggr;≦20 at %), B with a concentration &dgr; of 1-7 at % (1 at %≦&dgr;≦7 at %), and Cu with a concentration &egr; of 2-7 at % (2 at %≦&egr;≦7 at %).

    摘要翻译: 磁存储介质包括Co-Cr-Pt-B-Cu体系的Co合金的磁性层,其中磁性层具有厚度t和满足关系式(txBr)2.0nT.m的剩余磁通密度Br。 <=(TXBr)<= 7.0nT.m,其中除了Co之外,Co合金还含有浓度为20-26at%(20at%<=β<= 26at%)的Cr, 浓度δ为6-20at%(6at%<=γ<= 20at%),B浓度为1-7at%(1at%≤Δ7at%)和Cu 浓度ε为2-7at%(2at%<=ε= 7 AT%)。

    Magnetic recording medium and magnetic storage unit
    5.
    发明申请
    Magnetic recording medium and magnetic storage unit 审中-公开
    磁记录介质和磁存储单元

    公开(公告)号:US20070275269A1

    公开(公告)日:2007-11-29

    申请号:US11583283

    申请日:2006-10-19

    IPC分类号: G11B5/66

    摘要: A magnetic recording medium is disclosed that includes a substrate; and an underlayer, a first magnetic layer, a non-magnetic coupling layer, a second magnetic layer, a third magnetic layer, a non-magnetic separation layer, and a fourth magnetic layer stacked in this order on the substrate. The first magnetic layer and the second magnetic layer are antiferromagnetically exchange-coupled, and the second magnetic layer and the third magnetic layer are ferromagnetically exchange-coupled. The third magnetic layer has an anisotropic magnetic field smaller than the anisotropic magnetic field of the second magnetic layer, and has a saturation magnetization greater than the saturation magnetization of the second magnetic layer.

    摘要翻译: 公开了一种包括基板的磁记录介质; 以及在基板上依次层叠的底层,第一磁性层,非磁性耦合层,第二磁性层,第三磁性层,非磁性分离层和第四磁性层。 第一磁性层和第二磁性层是反铁磁交换耦合的,第二磁性层和第三磁性层是铁磁交换耦合的。 第三磁性层具有比第二磁性层的各向异性磁场小的各向异性磁场,并且具有大于第二磁性层的饱和磁化强度的饱和磁化强度。