Thermal hysteresis scaling for first-order phase transitions

被引：30

作者：

Zheng, GP ^{[1
]}

Zhang, JX ^{[1
]}

机构：

[1] Zhongshan Univ, Dept Phys, Guangzhou 5102759, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1998年 / 10卷 / 02期

关键词：

D O I：

10.1088/0953-8984/10/2/006

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

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 - Q(0) proportional to R-b. 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.

引用

页码：275 / 284

页数：10

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