Patent ID: 8687319
Filing Date: 2014-04-01
Classification: G11B

Abstract:
1. A magnetic recording head comprising: a main pole; and a spin torque oscillator arranged in the vicinity of the main pole, wherein the magnetic recording head records information by switching magnetization of a magnetic recording medium with a switching field generated by the main pole and a high-frequency magnetic field generated by the spin torque oscillator, the spin torque oscillator includes a perpendicular free layer formed of a magnetic film having a magnetic anisotropy axis in a direction perpendicular to a film surface, magnetization of the perpendicular free layer being rotatable, and an in-plane free layer formed of a magnetic film effectively having a magnetization easy plane on a film surface, magnetization of the in-plane free layer being rotatable, and an electric current flows from an in-plane free layer side to a perpendicular free layer side in the spin torque oscillator; a non-magnetic layer is provided between the perpendicular free layer and the in-plane free layer.