US 12,190,920 B2
Spintronic device comprising dual FGL and dual SPL to reduce perpendicular field at writing location
Muhammad Asif Bashir, San Jose, CA (US); Alexander Goncharov, Morgan Hill, CA (US); Zhigang Bai, Fremont, CA (US); Masato Shiimoto, Fujisawa (JP); and Yunfei Ding, Fremont, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Jul. 25, 2023, as Appl. No. 18/226,111.
Claims priority of provisional application 63/421,487, filed on Nov. 1, 2022.
Prior Publication US 2024/0144963 A1, May 2, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G11B 5/235 (2006.01); G11B 5/127 (2006.01); G11B 5/31 (2006.01); G11B 5/00 (2006.01)
CPC G11B 5/3146 (2013.01) [G11B 5/1278 (2013.01); G11B 5/235 (2013.01); G11B 5/314 (2013.01); G11B 2005/0024 (2013.01); G11B 5/3116 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A magnetic recording head comprising:
a shield;
a main pole; and
a spintronic device disposed between the shield and the main pole, the spintronic device comprising:
a first spin kill layer disposed over the main pole;
a first spin polarization layer disposed over the first spin kill layer;
a first field generation layer disposed over the first spin polarization layer;
a second spin kill layer disposed over the first field generation layer;
a second spin polarization layer disposed over the second spin kill layer;
a second field generation layer disposed between the second spin polarization layer and the shield; and
one or more negative beta material layers disposed between the main pole and the second spin polarization layer.