Thermal hysteresis scaling for first-order phase transitions

被引：0

作者：

Zheng, G.P. ^{[1
]}

Zhang, J.X. ^{[1
]}

机构：

[1] Department of Physics, Zhongshan University, 135 XinGan Road West, GuangZhou,510275, China

来源：

Journal of Physics Condensed Matter | 1998年 / 10卷 / 02期

关键词：

Hysteresis - Ising model - Molecular dynamics - Monte Carlo methods - Intelligent systems - Thermal cycling;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We study the effects of time-dependent thermal cycling on the first-order phase transition in cubic Ising systems with four-spin interactions by means of Monte Carlo simulations. The thermal hysteresis or the energy dissipation Q of a thermal cycle can be scaled with respect to the linear heating or cooling rate R: Q - Q0 ∝ Rb. We find the exponent b is independent of the interaction strength, b = 0.47 ± 0.05 in an SC lattice while in an FCC lattice and a compressible Ising lattice b = 0.71 ± 0.07, 0.70 ± 0.05 respectively. These simulation results are also compared with the kinetic Ising model and N-vector model in Langevin dynamics. © 1998 IOP Publishing Ltd.

引用

页码：275 / 284

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