High-frequency oscillation device, magnetic recording head including the same, and disk device

摘要

A magnetic recording head includes a main magnetic pole that applies a recording magnetic field to a recording layer of a recording medium, a write shield that faces the main magnetic pole with a write gap therebetween, a recording coil that generates a magnetic field in the main magnetic pole, a high-frequency oscillator that includes a field generation layer and a spin injection layer, and is disposed within the write gap between the main magnetic pole and the write shield, a wiring electrically connected to the high-frequency oscillator, a modulation electrode that applies a modulation voltage to the field generation layer, and a modulation insulating layer that is interposed between the field generation layer and the modulation electrode.

主权项

1. A spin torque type high-frequency oscillation device comprising:
a high-frequency oscillator which includes a field generation layer and a spin injection layer, to which an external magnetic field and a bias current are applied; a modulation electrode that applies a modulation voltage to the field generation layer; and a modulation insulating layer that is interposed between the field generation layer and the modulation electrode.