Patent ID: 8953283
Filing Date: 2015-02-10
Classification: G11B

Abstract:
1. A magnetic head comprising: a main magnetic pole configured to apply a recording magnetic field to a recording magnetic medium; an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole; and a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole, the spin torque oscillator including a transmission-type spin transfer layer including a first perpendicular magnetization film formed on one of the main magnetic pole and the auxiliary magnetic pole, and a first interface magnetic layer formed on the first perpendicular magnetization film and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium, a first interlayer formed on the transmission-type spin transfer layer, an oscillation layer formed on the first interlayer, a second interlayer formed on the oscillation layer, and an reflection-type spin transfer layer including a second perpendicular magnetization film formed on the second interlayer.