Invention Grant
- Patent Title: Dual spin-orbit torque oscillator in magnetic recording
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Application No.: US16243851Application Date: 2019-01-09
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Publication No.: US10403309B2Publication Date: 2019-09-03
- Inventor: Zhanjie Li , Suping Song , Michael 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
- Agent Steven Versteeg
- Main IPC: G11B5/31
- IPC: G11B5/31 ; G11B5/127 ; H01L27/22 ; H01L43/08 ; G01R33/12 ; G11C11/18 ; H01L43/04 ; G11B5/00

Abstract:
The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a main pole, a trailing shield, and an oscillator located between the main pole and the trailing shield. The oscillator is disposed at a media facing surface (MFS). The oscillator includes a spin-torque layer sandwiched between two distinct spin Hall layers. The two distinct spin Hall layers generate spin-orbit torque (SOT) that induces in-plane precessions on opposite surfaces of the spin-torque layer, and both in-plane precessions are in the same direction. The same-direction in-plane precessions on opposite surfaces of the spin-torque layer reduce the critical current of the oscillation of the oscillator, leading to high quality recording.
Public/Granted literature
- US20190147907A1 DUAL SPIN-ORBIT TORQUE OSCILLATOR IN MAGNETIC RECORDING Public/Granted day:2019-05-16
Information query
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