Journal
PHYSICAL REVIEW B
Volume 82, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.012408
Keywords
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Funding
- The Swedish Research (SSF)
- The Swedish Research Council (VR)
- Goran Gustafsson Foundation
- U.S. Army TARDEC [W56HZV-09-P-L564]
- RDECOM
- National Science Foundation of the USA [ECCS-0653901]
- Royal Swedish Academy of Sciences Research
- Knut and Alice Wallenberg Foundation
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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 mu of the driving force exceeds a certain critical value mu(cr), the transition to the synchronized regime becomes oscillatory with a frequency proportional to proportional to root mu-mu(cr) and a synchronization time that is almost independent of mu. 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.
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