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Kinetic Ising System in an Oscillating External Field: Stochastic Resonance and Residence-Time Distributions

S. W. Sides·R. A. Ramos·P. A. Rikvold·M. A. Novotny
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Abstract

Experimental, analytical, and numerical results suggest that the mechanism by which a uniaxial single-domain ferromagnet switches after sudden field reversal depends on the field magnitude and the system size. Here we report new results on how these distinct decay mechanisms influence hysteresis in a two-dimensional nearest-neighbor kinetic Ising model. We present theoretical predictions supported by numerical simulations for the frequency dependence of the probability distributions for the hysteresis-loop area and the period-averaged magnetization, and for the residence-time distributions. The latter suggest evidence of stochastic resonance for small systems in moderately weak oscillating fields.

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S. W. Sides, R. A. Ramos, P. A. Rikvold, M. A. Novotny. 1997-10-23. Kinetic Ising System in an Oscillating External Field: Stochastic Resonance and Residence-Time Distributions. https://doi.org/10.1063/1.364611

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