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Amplitude-Phase Coupling in a Spin-Torque Nano-Oscillator

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arxiv 0811.0425 v1 pith:ARDMGYQZ submitted 2008-11-04 cond-mat.mtrl-sci cond-mat.other

Kiwamu Kudo , Tazumi Nagasawa , Rie Sato , Koichi Mizushima This is my paper · ORCID
classification cond-mat.mtrl-scicond-mat.other
keywords amplitude-phasecouplingnano-oscillatorspin-torquefactoradditiveanisotropyapplication
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The spin-torque nano-oscillator in the presence of thermal fluctuation is described by the normal form of the Hopf bifurcation with an additive white noise. By the application of the reduction method, the amplitude-phase coupling factor, which has a significant effect on the power spectrum of the spin-torque nano-oscillator, is calculated from the Landau-Lifshitz-Gilbert-Slonczewski equation with the nonlinear Gilbert damping. The amplitude-phase coupling factor exhibits a large variation depending on in-plane anisotropy under the practical external fields.

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