HYSTERESIS AND HIERARCHIES - DYNAMICS OF DISORDER-DRIVEN 1ST-ORDER PHASE-TRANSFORMATIONS
HYSTERESIS AND HIERARCHIES - DYNAMICS OF DISORDER-DRIVEN 1ST-ORDER PHASE-TRANSFORMATIONS
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DOI：
10.1103/physrevlett.70.3347
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发表时间：
1993-05-24
影响因子：
8.6
通讯作者：
SHORE, JD
中科院分区：
文献类型：
--
作者：
SETHNA, JP;DAHMEN, K;SHORE, JD
我们使用零温无规场伊辛模型来研究一阶相变的滞回行为。通过零扫描外部场，该模型表现出滞后，返回点记忆效应，和雪崩波动。有一个临界值的无序在磁化跳（对应于一个无限雪崩）首先发生。我们使用平均场理论研究了在这个临界点的普遍行为，并给出了三维数值模拟的结果。
We use the zero-temperature random-field Ising model to study hysteretic behavior at first-order phase transitions. Sweeping the external field through zero, the model exhibits hysteresis, the return-point memory effect, and avalanche fluctuations. There is a critical value of disorder at which a jump in the magnetization (corresponding to an infinite avalanche) first occurs. We study the universal behavior at this critical point using mean-field theory, and also present results of numerical simulations in three dimensions.