High frequency magnetic field assisted magnetic recording head

摘要

To uniformly determine the positional relationship between a main magnetic pole and a spin torque oscillator while independently optimizing the main magnetic pole and the spin torque oscillator. On a trailing end surface of a main magnetic pole, a step is provided at the boundary between the main magnetic pole and a gap material disposed on both sides thereof, and a spin torque oscillator is formed on the step. The spin torque oscillator is effectively separated into two regions by utilizing the step. Further, a part of the spin torque oscillator is removed so as to disable the unwanted region, thereby realizing a self-alignment type high frequency magnetic field assisted magnetic recording head structure such that the positions of the end portions of the main magnetic pole and the spin torque oscillator are aligned.

主权项

1. A high frequency magnetic field assisted magnetic recording head comprising:
a main magnetic pole that generates a recording field; and a spin torque oscillator disposed in the vicinity of the main magnetic pole, wherein: a magnetic shield or a wire for supplying electric power to the spin torque oscillator is disposed in contact with a surface of the spin torque oscillator on the opposite side from a surface thereof on the main magnetic pole side; a step is formed at a boundary position between the main magnetic pole and a gap material disposed on both sides of the main magnetic pole in a direction perpendicular to a film stacked direction, and/or between the gap material and a side shield contacting the gap material in the perpendicular direction on trailing side surfaces thereof in at least an air bearing surface; and the spin torque oscillator is formed on the step in at least the air bearing surface.