Invention Grant
- Patent Title: Spin-orbit torque induced magnetization switching in a magnetic recording head
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Application No.: US16560844Application Date: 2019-09-04
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Publication No.: US10650847B2Publication Date: 2020-05-12
- Inventor: Zhanjie Li , Suping Song , Kuok San Ho
- Applicant: Western Digital Technologies, Inc.
- Applicant Address: US CA San Jose
- Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee Address: US CA San Jose
- Agency: Patterson & Sheridan, LLP
- Main IPC: G11B5/31
- IPC: G11B5/31 ; G11B5/37 ; G11B5/00

Abstract:
The present disclosure generally relates to magnetic media devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The recording head includes a main pole, a trailing shield hot seed layer, a spin Hall layer disposed between the main pole and the trailing shield hot seed layer, and a spin-torque layer disposed between the main pole and the trailing shield hot seed layer. Spin-orbit torque (SOT) is generated from the spin Hall layer. The spin-torque layer magnetization switching or precession is induced by the SOT. The SOT based head reduces the switching current and the Vjump due to higher spin polarization ratio, which improves energy efficiency. In addition, the spin Hall layer and the spin-torque layer are easier to form compared to the conventional pseudo spin-valve structure.
Public/Granted literature
- US20190392861A1 SPIN-ORBIT TORQUE INDUCED MAGNETIZATION SWITCHING IN A MAGNETIC RECORDING HEAD Public/Granted day:2019-12-26
Information query
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