Magnetic recording head, and disk device provided with the same

A disk device comprising:

• a recording medium including a magnetic recording layer;
• a drive mechanism configured to rotate the recording medium;
• and
• a magnetic recording head including a main magnetic pole, a write shield which faces the main magnetic pole with a write gap interposed therebetween, a coil configured to generate a magnetic field in the main magnetic pole, and a spin torque oscillator arranged in the write gap, the spin torque oscillator including an intermediate layer formed on the main magnetic pole, a field generation layer formed on the intermediate layer, a spin injection layer, and an interface magnetic layer, wherein
• the field generation layer and the spin injection layer are arranged in parallel to each other in a direction which intersects with a gap length direction of the write gap, and
• the spin injection layer is electrically connected with the write shield.