Line shape distortion in a nonlinear auto-oscillator near generation threshold: application to spin-torque nano-oscillators.
Phys Rev Lett
; 100(16): 167201, 2008 Apr 25.
Article
en En
| MEDLINE
| ID: mdl-18518238
ABSTRACT
The power spectrum of an auto-oscillator with a large frequency nonlinearity in a noisy environment is calculated. The power spectrum becomes strongly non-Lorentzian, broadened, and asymmetric near the generation threshold. A Lorentzian spectrum is recovered far below and far above the threshold, which suggests that line shape distortions provide a signature of the threshold. We show that the developed theory adequately describes the observed behavior of a strongly nonlinear spin-torque nano-oscillator.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2008
Tipo del documento:
Article
País de afiliación:
Francia