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

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

2008-11-04

arxiv.org/abs/0811.0425v1

Physics

Condensed Matter

Materials Science

4 pages, 4 figures, submitted to Journal of Applied Physics via MMM 2008

Scientific paper

10.1063/1.3056407

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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