LOSS OF LONG-RANGE ORDER IN THE 3D RANDOM-FIELD ISING-MODEL

被引：24

作者：

HILL, JP ^{[1
]}

FENG, Q ^{[1
]}

BIRGENEAU, RJ ^{[1
]}

THURSTON, TR ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,UPTON,NY 11973

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.70.3655

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a synchrotron magnetic x-ray scattering study of the temperature evolution of the magnetic long range order (LRO) of Mn0.75Zn0.25F2 in a magnetic field with emphasis on the behavior after zero field cooling (ZFC). We show that with increasing temperature the metastable ZFC LRO vanishes continuously at a temperature well above the equilibrium T(N); the LRO follows a rounded power law with exponent beta(ZFC) = 0.20 +/- 0.02 and a transition width which scales as approximately H-2 but with no divergent critical fluctuations. We argue that this behavior is generic to the random field Ising model.

引用

页码：3655 / 3658

页数：4

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