Magnetic recording head with spin torque oscillator

摘要

According to one embodiment, a magnetic recording head includes a main magnetic pole, an auxiliary magnetic pole, and a spin torque oscillator formed between them. The spin torque oscillator includes a main oscillation layer and spin sink layer as an oscillation layer. The spin sink layer contains one of iron and cobalt, and at least one element selected from the group consisting of platinum, palladium, ruthenium, tantalum, chromium, terbium, gadolinium, europium, dysprosium, and samarium.

主权项

1. A magnetic recording head comprising:
a main magnetic pole configured to apply a recording magnetic field to a magnetic recording 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, wherein the spin torque oscillator comprises: a spin transfer layer and an oscillation layer formed in this order from a side of the main magnetic pole, the oscillation layer including a main oscillation layer and a spin sink layer formed in contact with the main oscillation layer and containing one of iron and cobalt, and 0.5 to 75 at % of at least one element selected from the group consisting of platinum, palladium, ruthenium, tantalum, chromium, terbium, gadolinium, europium, dysprosium, and samarium, in which exchanging coupling acts between the spin sink layer and the main oscillation layer; and an interlayer formed between the spin transfer layer and the oscillation layer.