Properties of quasi-soliton states in nonlinear media under local high-frequency irradiation. Analytic description and comparison with numerical simulations

Spatially localized excitation of a one-dimensional magnetic system in an external high-frequency field is studied analytically (collective variable method) and numerically. The dependences of the amplitude of local quasi-soliton states on the amplitude of this field for different frequencies and da...

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Bibliographic Details
Published in:Low temperature physics (Woodbury, N.Y.) N.Y.), 2016-12, Vol.42 (12), p.1130-1138
Main Authors: Belan, V. I., Kovalev, A. S., Peretyatko, A. A.
Format: Article
Language:English
Subjects:
Amplitudes
Computer simulation
Damping
Dependence
Dynamical systems
Nonlinear dynamics
Nutation
Period doubling
Stability
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Summary:Spatially localized excitation of a one-dimensional magnetic system in an external high-frequency field is studied analytically (collective variable method) and numerically. The dependences of the amplitude of local quasi-soliton states on the amplitude of this field for different frequencies and damping in the system are found for the case of direct application of a localized magnetic field. The field dependence is found to have hysteresis and “instability windows” in the stationary states. Within these instability regions, the excitations become nonstationary: they are accompanied by additional periodic nutation of the magnetization vector. Here such nonlinear dynamics phenomena as period doubling and transitions to chaos are observed.
ISSN:1063-777X
1090-6517
DOI:10.1063/1.4973400