The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 2025
Filed:
Jul. 25, 2023
Spintronic device comprising dual fgl and dual spl to reduce perpendicular field at writing location
Western Digital Technologies, Inc., San Jose, CA (US);
Muhammad Asif Bashir, San Jose, CA (US);
Alexander Goncharov, Morgan Hill, CA (US);
Zhigang Bai, Fremont, CA (US);
Masato Shiimoto, Fujisawa, JP;
Yunfei Ding, Fremont, CA (US);
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head. The magnetic recording head comprises a main pole, a hot seed layer, and a spintronic device disposed between the main pole and the hot seed layer. The spintronic device comprises two field generation layers (FGLs), two spin polarization layers (SPLs), and two spin kill layers. The second SPL of the spintronic device drives the second FGL. The spintronic device further comprises one or more optional thin negative beta material layers, such as layers comprising FeCr, disposed in contact with at least one of the spin kill layers. When electric current is applied, the spin kill layers and optional negative beta material layers eliminate or reduce any spin torque between the FGLs and the SPLs.