公开(公告)号：US20240420733A1

公开(公告)日：2024-12-19

申请号：US18740054

申请日：2024-06-11

Applicant: Western Digital Technologies, Inc.

Inventor： Quang LE ,  Brian R. YORK ,  Sharon Swee Ling BANH ,  Hassan OSMAN ,  Hisashi TAKANO

IPC: G11B5/39 ,  G01R33/09 ,  G11C11/16 ,  H03K19/18 ,  H10B61/00 ,  H10N50/10 ,  H10N50/85 ,  H10N52/80

Abstract: The present disclosure generally relates to spintronic material stacks and devices. The various disclosed embodiments of YBiPt based spin orbit torque (SOT) stacks can be used for high temperature applications. Disclosed herein are various buffer and/or interlayer configurations in spintronic stacks that can promote growth of YBiPt in the (110) orientation, to promote a high spin Hall angle (SHA) in SOT applications. One embodiment is a spintronic stack comprising a buffer layer comprising one or more layers, the one or more layers each individually comprising: MgO (100), TiN (100), Ta, Nb, HfN, Ta3W2 (110), TaW2 (100), Ta3W2N, TaW2N, or heated YPt, an SOT layer comprising YBiPt in the (110) orientation, an interlayer comprising one or more of MgO, Ta3WN, TaW3N, Ta3W (110), TaW3 (100), YPt (110), NiFeGeN, NiAlN, NiAl, NiFeGe, NiAlGe, or HfN, and a ferromagnetic layer.

公开(公告)号：US20240428820A1

公开(公告)日：2024-12-26

申请号：US18367882

申请日：2023-09-13

Applicant: Western Digital Technologies, Inc. ,  Tokyo Institute of Technology

Inventor： Quang LE ,  Xiaoyong LIU ,  Brian R. YORK ,  Cherngye HWANG ,  Son T. LE ,  Hisashi TAKANO ,  Fan TUO ,  Hassan OSMAN ,  Nam Hai PHAM

IPC: G11B5/39

Abstract: The present disclosure generally relates to a magnetic recording head comprising a read head. The read head comprises a first sensor disposed at a media facing surface (MFS) comprising at least one free layer, a second sensor disposed at the MFS comprising at least one free layer, a first spin generator spaced from the first sensor and recessed from the MFS, and a second spin generator spaced from the second sensor and recessed from the MFS. The first and second spin generators each individually comprises at least one spin orbit torque (SOT) layer. The SOT layer may comprise BiSb. The first and second sensors are configured to detect a read signal using a first voltage lead and a second voltage lead. The first and second spin generators are configured to inject spin current through non-magnetic layers to the first and second sensors using a plurality of current leads.

公开(公告)号：US20240420732A1

公开(公告)日：2024-12-19

申请号：US18367877

申请日：2023-09-13

Applicant: Western Digital Technologies, Inc. ,  Tokyo Institute of Technology

Inventor： Quang LE ,  Xiaoyong LIU ,  Brian R. YORK ,  Cherngye HWANG ,  Son T. LE ,  Hisashi TAKANO ,  Fan TUO ,  Hassan OSMAN ,  Nam Hai PHAM

IPC: G11B5/31

Abstract: The present disclosure generally relates to a magnetic recording head comprising a read head. The read head comprises a sensor disposed at a media facing surface (MFS) and a spin generator spaced from the sensor and recessed from the MFS. The sensor and spin generators are disposed on a non-magnetic layer. The sensor comprises a free layer and the spin generator comprises at least one spin orbit torque (SOT) layer. The SOT layer may comprise topological material such as BiSb. The sensor is configured to detect a read signal using a first voltage lead and a second voltage lead. The spin generator is configured to inject spin current through the non-magnetic layer to the sensor using a first current lead and a second current lead. The shape of the non-magnetic layer is a triangular or trapezoidal shape to further concentrate spin current.