Patent ID: 8902544
Filing Date: 2014-12-02
Classification: B82Y,G01R,G11B,H01F

Abstract:
1. A magnetic head, comprising: a first shield; a spin torque oscillator (STO) sensor positioned above the first shield, the STO sensor comprising a reference layer and a free layer positioned above the reference layer; a second shield positioned above the STO sensor; and at least one side shield having a portion thereof positioned in a plane of deposition of the free layer, wherein one or more of the at least one side shield comprises a highly magnetically permeable material that is exchange decoupled and electrically decoupled from the STO sensor, wherein the second shield is directly exchange coupled with the at least one side shield, wherein a magnetization of the at least one side shield provides a magnetic bias to the STO sensor, and wherein the STO sensor comprises at least one of: two substantially antiparallel coupled oscillating layers, a three terminal STO sensor structure, and a thermagnonic STO sensor structure.