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    Method to Enhance Spin Torque Layer Performance in a Spintronic Device
    1.
    发明公开
    Method to Enhance Spin Torque Layer Performance in a Spintronic Device 审中-公开

    公开(公告)号：US20240135966A1

    公开(公告)日：2024-04-25

    申请号：US18226114

    申请日：2023-07-24

    申请人： Western Digital Technologies, Inc.

    发明人： Muhammad ASIF BASHIR ,  Alexander GONCHAROV ,  Yaguang WEI

    IPC分类号： G11B5/31

    CPC分类号： G11B5/315 ,  G11B5/314

    摘要： The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head. The magnetic recording head comprises a main pole (MP), a shield, and a spintronic device disposed between the MP and the shield. The spintronic device comprises a MP notch disposed on the MP, a first spin torque layer (STL), a second STL, a spin kill layer disposed between the first and second STLs, and a shield notch. The spin kill layer prevents spin torque from being transferred between the first STL and the second STL. In a forward stack where electrons flow from the MP to the shield, the MP notch comprises FeCr and the shield notch comprises CoFe. In a reverse stack where electrons flow from the shield to the MP, the MP notch comprises CoFe and the shield notch comprises FeCr.

    Leading shield for magnetic recording heads
    3.
    发明授权
    Leading shield for magnetic recording heads 有权

    公开(公告)号：US11881235B2

    公开(公告)日：2024-01-23

    申请号：US17652066

    申请日：2022-02-22

    申请人： Western Digital Technologies, Inc.

    发明人： Alexander Goncharov ,  Zhanjie Li ,  Terence T. Lam ,  Suping Song

    IPC分类号： G11B5/31 ,  G11B5/187 ,  G11B5/127

    CPC分类号： G11B5/3116 ,  G11B5/1276 ,  G11B5/187 ,  G11B5/315

    摘要： The present disclosure relates to a magnetic recording head having an exchange biased leading shield or leading edge shield (LES). The LES is a bilayer structure. One or more layers are coupled below the LES such that the LES is disposed between the main pole and the one or more layers. The one or more layers exchange bias the LES such that the upper layer of the LES has a magnetization parallel to the magnetization of the trailing shield. The lower layer of the LES has a magnetization that is antiparallel to the magnetization of the upper layer of the LES. The one or more layers set the preferred direction for the lower layer of the LES and sets the LES as a two-domain state without relying upon the anisotropy field (Hk) of either the upper or lower layers of the LES.

    SOT film stack for differential reader
    4.
    发明授权
    SOT film stack for differential reader 有权

    公开(公告)号：US11776567B2

    公开(公告)日：2023-10-03

    申请号：US17395306

    申请日：2021-08-05

    申请人： Western Digital Technologies, Inc.

    发明人： Cherngye Hwang ,  Xiaoyong Liu ,  Quang Le ,  Kuok San Ho ,  Hisashi Takano ,  Brian R. York

    IPC分类号： G11B5/31 ,  G11B5/11

    CPC分类号： G11B5/315 ,  G11B5/11

    摘要： The present disclosure generally relates to spin-orbital torque (SOT) differential reader designs. The SOT differential reader is a multi-terminal device comprising a first seed layer, a first spin hall effect (SHE) layer, a first interlayer, a first free layer, a gap layer, a second seed layer, a second SHE layer, a second free layer, and a second interlayer. The gap layer is disposed between the first SHE layer and the second SHE layer. The materials and dimensions used for the first and second seed layers, the first and second interlayers, and the first and second SHE layers affect the resulting spin hall voltage converted from spin current injected from the first free layer and the second free layer, as well as the ability to tune the first and second SHE layers. Moreover, the SOT differential reader improves reader resolution without decreasing the shield-to-shield spacing (i.e., read-gap).