Non-localized spin valve reader hybridized with spin orbit torque layer

US12394432B2 · kind B2 · utility

Assignees

• Western Digital Technologies, Inc. · US
• Tokyo Institute of Technology · JP

Inventors

• Quang Le · San Jose, US
• Xiaoyong Liu · San Jose, US
• Brian R. York · San Jose, US
• Cherngye Hwang · San Jose, US
• Son Le · Gilroy, US
• Hisashi Takano · San Jose, US
• Fan Tuo · Fujisawa, JP
• Hassan Osman · San Jose, US
• Nam Hai PHAM · Carpinteria, US

Key dates

• Filing date: Sep 13, 2023
• Grant date: Aug 19, 2025
• Expiry date: Sep 13, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B2005/3996
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

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.