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Spin orbital torque based microwave assisted magnetic recording with dual spin hall layers or wrap around spin hall layer

專利號(hào)
US10867626B1
公開日期
2020-12-15
申請(qǐng)人
Western Digital Technologies, Inc.(US CA San Jose)
發(fā)明人
Zhanjie Li; Suping Song; Lijie Guan
IPC分類
G11B5/37; G11B5/235; G11B5/31; G11B5/127; G11B5/00
技術(shù)領(lǐng)域
spin,hall,stl,sot,layer,trailing,shield,charge,write,mfs
地域: CA CA San Jose

摘要

A magnetic recording head includes a trailing shield and a main pole. A trailing shield gap is between the trailing shield and the main pole. A spin orbital torque structure is within the trailing shield gap. The spin orbital torque structure includes a spin torque layer having a first side and a second side at a media facing surface. A first spin Hall layer is along the first side of the spin torque layer. A second spin Hall layer is along the second side of the spin torque layer. The first spin Hall layer comprises a heavy metal material having a positive spin Hall angle. The second spin Hall layer comprises a heavy metal material having a negative spin Hall angle.

說明書

In one embodiment, a magnetic recording head includes a trailing shield and a main pole. A trailing shield gap is between the trailing shield and the main pole. A spin orbital torque structure is within the trailing shield gap. The spin orbital torque structure includes a spin torque layer having a first side and a second side at a media facing surface. A first spin Hall layer is along the first side of the spin torque layer. A second spin Hall layer is along the second side of the spin torque layer. The first spin Hall layer comprises a heavy metal material having a positive spin Hall angle. The second spin Hall layer comprises a heavy metal material having a negative spin Hall angle.

In another embodiment, a magnetic recording head includes a trailing shield and a main pole. A trailing shield gap is between the trailing shield and the main pole. A spin torque layer is within the trailing shield gap. The spin torque layer has a first side, a second side, and a third side at a media facing surface. A spin Hall structure is wrapped around the first side, the second side, and the third side of the spin torque layer.

In still another embodiment, a magnetic recording head includes a trailing shield and a main pole. A trailing shield gap is between the trailing shield and the main pole. A spin torque layer is within the trailing shield gap. The spin torque layer has a media facing surface. A spin Hall means is disposed within the trailing shield gap. The spin Hall means is for producing two or more spin current in the same direction along at least two sides of the spin torque layer at the media facing surface. The spin Hall means is also for producing two or more ampere magnetic fields.

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