公开(公告)号：US10811039B2

公开(公告)日：2020-10-20

申请号：US16748881

申请日：2020-01-22

Applicant: Western Digital Technologies, Inc.

Inventor： James Terrence Olson ,  Hiroyuki Hoshiya ,  Alexander Goncharov ,  Masato Shiimoto ,  Mikito Sugiyama

IPC: G11B5/39 ,  G11B5/31 ,  G11B5/00

Abstract: Disclosed herein are perpendicular magnetic recording writers for providing spin-torque-assisted write field enhancement, and hard disk drives comprising such magnetic write heads. A spin-torque-assisting element is disposed in the write gap and extends to the air-bearing surface (ABS). The spin-torque-assisting element comprises a non-magnetic layer in contact with a main pole, a DC-field generation (DFG) layer with a first side in contact with the non-magnetic layer, and a spacer layer in contact with a second side of the DFG layer. A magnetization of the DFG layer is configured to be aligned substantially parallel to a write gap magnetic field generated by the main pole during a write process, and the magnetization of the DFG layer is configured to flip its direction in response to application of a bias current exceeding a specified magnitude.