Patent ID: 8687321

Claim:
A magnetic recording apparatus comprising: a magnetic head assembly including: a magnetic recording head including: a spin torque oscillator including: an oscillation layer including a Feâ€”Co alloy containing at least one selected from the group consisting of Al, Si, Ge, Mn, Cr, and B, the Feâ€”Co alloy having bcc structure, and an Fe composition of the Feâ€”Co alloy being 20 atomic % or more, the oscillation layer having a thickness from 5-20 nanometers and a saturation magnetization from 500-1300 emu/cc, a spin injection layer including a magnetic film with an anisotropy perpendicular to a film surface of the magnetic film, and an intermediate layer provided between the oscillation layer and the spin injection layer; and a main magnetic pole placed together with the spin torque oscillator; a head slider, the magnetic recording head being mounted on the head slider; a suspension, the head slider being mounted on a first end of the suspension; and an actuator arm connected to a second end of the suspension; a magnetic recording medium; and a signal processor configured to write and read a signal on the magnetic recording medium using the magnetic recording head.