Negative-polarization spin-torque-oscillator

摘要

Embodiments disclosed herein generally relate to a MAMR head. The MAMR head includes an STO. The STO has a first magnetic layer, a second magnetic layer and an interlayer disposed between the first and second magnetic layers. One of the first and second magnetic layers is made of a negative polarization material while the other magnetic layer is made of a positive polarization material. As a result, the magnetizations in the first and second magnetic layers are in the same direction when in oscillation, which suppresses the partial cancellation of the magnetizations in the first and second magnetic layers and strengthens the AC magnetic field.

主权项

1. A spin torque oscillator, comprising:
a first magnetic layer, wherein the first magnetic layer comprises a negative polarization material; a second magnetic layer, wherein the second magnetic layer comprises a positive polarization material; a third magnetic layer, wherein the third magnetic layer comprises a negative polarization material; a first interlayer disposed between the first magnetic layer and the second magnetic layer; and a second interlayer disposed between the second magnetic layer and the third magnetic layer.