Range of chaotic motion of a domain wall in a periodic drive field

The motion of a domain wall in a periodic drive field H0 sin ωt is studied with Slonczewski’s equations of motion using the fully implicit finite difference scheme. The motion is periodic, quasiperiodic or chaotic, depending on the values of the frequency ω, damping constant α, and magnetic filed st...

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Bibliographic Details
Published in:Journal of applied physics 1993, Vol.73 (1), p.320-322
Main Author: KOSINSKI, R. A
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
Magnetic properties and materials
Physics
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Summary:The motion of a domain wall in a periodic drive field H0 sin ωt is studied with Slonczewski’s equations of motion using the fully implicit finite difference scheme. The motion is periodic, quasiperiodic or chaotic, depending on the values of the frequency ω, damping constant α, and magnetic filed strength H0, while the other parameters are held constant. For a given magnitude of the magnetic field, there is a narrow frequency range in which the periodic motion extends to low values of the damping constant. This may be due to spin-wave-like excitations appearing in the sample. For low frequencies the border between the chaotic and periodic motion corresponds to the Walker limit of stationary motion yielding a value of the damping constant according to α=H0/2πM, where M is the magnetization.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.353851