HYSTERESIS AND HIERARCHIES - DYNAMICS OF DISORDER-DRIVEN 1ST-ORDER PHASE-TRANSFORMATIONS

被引：593

作者：

SETHNA, JP

DAHMEN, K

KARTHA, S

KRUMHANSL, JA

ROBERTS, BW

SHORE, JD

机构：

[1] Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.70.3347

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：3347 / 3350

页数：4

共 35 条

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