US 12,094,498 B1
Recording head with a multilayer spin torque element having positive and negative beta materials
Alexander Goncharov, Morgan Hill, CA (US); James Mac Freitag, Sunnyvale, CA (US); Susumu Okamura, San Jose, CA (US); and Muhammad Asif Bashir, San Jose, 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. 19, 2023, as Appl. No. 18/355,114.
Claims priority of provisional application 63/507,921, filed on Jun. 13, 2023.
Int. Cl. G11B 5/31 (2006.01); G11B 5/00 (2006.01)
CPC G11B 5/312 (2013.01) [G11B 2005/0024 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetic recording head, comprising:
a main pole;
a trailing shield;
one or more side shields;
a leading shield; and
a spin torque element disposed between the main pole and one or more of the trailing shield, the one or more side shields, and the leading shield, the spin torque element comprising:
a first magnetic spin torque layer comprising a negative beta material;
a second magnetic spin torque layer comprising a positive beta material, and
a magnetic layer configured to polarize an electron flow into the first magnetic spin torque layer, wherein the first magnetic spin torque layer is between the magnetic layer and second magnetic spin torque layer.