US 12,230,298 B2
Method to enhance spin torque layer performance in a spintronic device
Muhammad Asif Bashir, San Jose, CA (US); Alexander Goncharov, Morgan Hill, CA (US); and Yaguang Wei, Pleasanton, 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. 18/226,114.
Claims priority of provisional application 63/418,828, filed on Oct. 24, 2022.
Prior Publication US 2024/0135966 A1, Apr. 25, 2024
Prior Publication US 2024/0233759 A9, Jul. 11, 2024
Int. Cl. G11B 5/31 (2006.01); G11B 5/127 (2006.01); G11B 5/235 (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 5/315 (2013.01); G11B 2005/0024 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A magnetic recording head, comprising:
a main pole;
a shield; and
a spintronic device disposed between the main pole and the shield, the spintronic device comprising:
a main pole notch disposed on the main pole;
a first spin torque layer (STL) disposed over the main pole notch;
a spin kill layer disposed over the first STL;
a second STL disposed over the spin kill layer; and
a shield notch disposed over the second STL,
wherein:
the main pole notch comprises FeCr and the shield notch comprises CoFe; or
the main pole notch comprises CoFe and the shield notch comprises FeCr.