Oscillatory transient regime in the forced dynamics of a nonlinear auto oscillator
2010 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 82, no 1, 012408- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2010. Vol. 82, no 1, 012408- p.
IdentifiersURN: urn:nbn:se:kth:diva-29433DOI: 10.1103/PhysRevB.82.012408ISI: 000280207800001ScopusID: 2-s2.0-77956511564OAI: oai:DiVA.org:kth-29433DiVA: diva2:397554
FunderSwedish Research CouncilKnut and Alice Wallenberg Foundation
QC 201102152011-02-152011-02-022011-02-15Bibliographically approved