Spin-torque oscillator based on easy-cone anisotropy
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United States of America Patent
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May 8, 2018
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app pub date -
Mar 10, 2016
filing date -
Nov 19, 2015
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Abstract
A spin-torque oscillator includes: a driving reference layer having a fixed magnetization; a nonmagnetic spacer layer; and a free layer having a changeable magnetization exhibiting an easy-cone magnetic anisotropy, the nonmagnetic spacer layer being between the driving reference layer and the free layer, a magnetic anisotropy energy of the free layer having a local maximum along an axis, a local minimum at an angle from the axis, and a global maximum different from the local maximum, the angle being greater than zero degrees, wherein the spin-torque oscillator is configured such that the changeable magnetization of the free layer precesses around the axis.
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