Hysteresis loop areas in kinetic Ising models: Effects of the switching mechanism

Details Hysteresis loop areas in kinetic Ising models: Effects of the switching mechanism Hysteresis loop areas in kinetic Ising models: Effects of the switching mechanism

1997-10-22

arxiv.org/abs/cond-mat/9710244v2

J. Appl. Phys., 83 (1998) 6494

Physics

Condensed Matter

Materials Science

9 pages including 3 figures. Submitted as a manuscript for the 7th Joint MMM-Intermag conference. To be published in the Journ

Scientific paper

10.1063/1.367600

Experiments on ferromagnetic thin films have measured the dependence of the hysteresis loop area on the amplitude and frequency of the external field, $A$=$A(H_{0},\omega)$, and approximate agreement with numerical simulations of Ising models has been reported. Here we present numerical and theoretical calculations of $A$ in the low-frequency regime for two values of $H_{0}$, which bracket a temperature and system-size dependent crossover field. Our previous Monte Carlo studies have shown that the hysteretic response of the kinetic Ising model is qualitatively different for amplitudes above and below this crossover field. Using droplet theory, we derive analytic expressions for the low-frequency asymptotic behavior of the hysteresis loop area. In both field regimes, the loop area exhibits an extremely slow approach to an asymptotic, logarithmic frequency dependence of the form $A \propto - [\ln (H_{0} \omega)]^{-1}$. Our results are relevant to the interpretation of data from experiments and simulations, on the basis of which power-law exponents for the hysteresis-loop area have been reported.

Affiliated with

Also associated with

No associations

Rating

Hysteresis loop areas in kinetic Ising models: Effects of the switching mechanism does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hysteresis loop areas in kinetic Ising models: Effects of the switching mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hysteresis loop areas in kinetic Ising models: Effects of the switching mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-42861