公开(公告)号：US20250095673A1

公开(公告)日：2025-03-20

申请号：US18368220

申请日：2023-09-14

Applicant: Western Digital Technologies, Inc.

Inventor： Quang LE ,  Xiaoyong LIU ,  Fan TUO ,  Brian R. YORK ,  Cherngye HWANG ,  Hisashi TAKANO

IPC: G11B5/127

Abstract: The present disclosure generally relates to a magnetic recording head comprising one or more spin-orbit torque (SOT) devices, the SOT devices each comprising a bismuth antimony (BiSb) layer. The magnetic recording head comprises a SOT device comprising a first shield extending to a media facing surface (MFS), a seed layer disposed over the first shield, the seed layer being disposed at the MFS, a free layer disposed on the seed layer, the free layer being disposed at the MFS, a bismuth antimony (BiSb) layer disposed over the free layer, the BiSb layer being recessed from the MFS, a second shield disposed over the BiSb layer, the second shield extending to the MFS, and a shield notch coupled to the second shield, the shield notch being disposed between the first shield and the second shield. The magnetic recording head may be a two-dimensional magnetic recording head comprising two SOT devices.

公开(公告)号：US20250006221A1

公开(公告)日：2025-01-02

申请号：US18229785

申请日：2023-08-03

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

Inventor： Quang LE ,  Xiaoyong LIU ,  Cherngye HWANG ,  Brian R. YORK ,  Son T. LE ,  Sharon Swee Ling BANH ,  Maki MAEDA ,  Fan TUO ,  Yu TAO ,  Hisashi TAKANO ,  Nam Hai PHAM

IPC: G11B5/39

Abstract: The present disclosure generally relates to a magnetic media drive comprising a magnetic recording head. The magnetic recording head comprises a main pole disposed at a media facing surface (MFS), a shield disposed at the MFS, a spin blocking layer disposed between the shield and the main pole, at least one non-magnetic layer disposed between the main pole and the shield, the at least one non-magnetic layer being disposed at the MFS, and at least one spin orbit torque (SOT) layer disposed over the at least one non-magnetic layer, the SOT layer being recessed a distance of about 20 nm to about 100 nm from the MFS. A ratio of a length of the SOT layer to a thickness of the SOT layer is greater than 1. The at least one SOT layer comprises BiSb.

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.