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

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

1996-09-09

arxiv.org/abs/cond-mat/9609086v2

J. Appl. Phys. Vol. 81, No. 8 15 April 1997

Physics

Condensed Matter

Includes updated results for Fig.2 and minor text revisions to the abstract and text for clarity

Scientific paper

10.1063/1.364611

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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