Metastable behavior of the spin-s Ising and Blume-Capel ferromagnets: A Monte Carlo study

Abstract

We present an extensive Monte Carlo investigation of the metastable lifetime through the reversal of the magnetization of spin-$s$ Ising and Blume-Capel models, where $s=\{1/2,1,3/2,2,5/2,3,7/2\}$. The mean metastable lifetime (or reversal time) is studied as a function of the applied magnetic field and for both models is found to obey the Becker-Doring theory, as was initially developed for the case of $s=1/2$ Ising ferromagnet within the classical nucleation theory. Moreover, the decay of metastable volume fraction nicely follows the Avrami's law for all values of $s$ and for both models considered.

arXiv comment21 preprint-style pages, 7 figures, 3 tables; version to be published in Phys. Rev. E

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