We demonstrate that the forced transient dynamics of a nonlinear (nonisochronous) auto-oscillator is qualitatively different from the dynamics of a quasilinear oscillator described by the classical Adler's model. If the normalized amplitude μ of the driving force exceeds a certain critical value μcr, the transition to the synchronized regime becomes oscillatory with a frequency proportional to ∝√ μ- μcr and a synchronization time that is almost independent of μ. The discovered effect is illustrated on the example of a strongly nonlinear spin torque nano-oscillator (STNO) where the finite transient synchronization time can limit the possible range of STNO modulation frequencies.

Oscillatory transient regime in the forced dynamics of nonlinear auto oscillator

CONSOLO, Giancarlo;AZZERBONI, Bruno;
2010-01-01

Abstract

We demonstrate that the forced transient dynamics of a nonlinear (nonisochronous) auto-oscillator is qualitatively different from the dynamics of a quasilinear oscillator described by the classical Adler's model. If the normalized amplitude μ of the driving force exceeds a certain critical value μcr, the transition to the synchronized regime becomes oscillatory with a frequency proportional to ∝√ μ- μcr and a synchronization time that is almost independent of μ. The discovered effect is illustrated on the example of a strongly nonlinear spin torque nano-oscillator (STNO) where the finite transient synchronization time can limit the possible range of STNO modulation frequencies.
2010
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/1901791
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