Kinetic Ising system in an oscillating external field: Stochastic resonance and residence-time distributions
- Center for Materials Research and Technology and Department of Physics, and Supercomputer Computations Research Institute, Florida State University, Tallahasse, Florida 32306-4052 (United States)
- Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306-4052 (United States)
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. {copyright} {ital 1997 American Institute of Physics.}
- Research Organization:
- Florida State University
- DOE Contract Number:
- FG02-85ER25000
- OSTI ID:
- 662028
- Report Number(s):
- CONF-961141--
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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