X-RAY AND NEUTRON-SCATTERING, MAGNETIZATION, AND HEAT-CAPACITY STUDY OF THE 3D RANDOM-FIELD ISING-MODEL

被引：31

作者：

BIRGENEAU, RJ

FENG, Q

HARRIS, QJ

HILL, JP

RAMIREZ, AP

THURSTON, TR

机构：

[1] BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA

[2] AT&T BELL LABS, MURRAY HILL, NJ 07974 USA

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.75.1198

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic x-ray and neutron scattering, SQUID magnetometry, and heat capacity measurements of Fe0.5Zn0.5F2 in a field are presented. The zero field cooled (ZFC) x-ray results exhibit no true phase transition. Discordantly, the temperature derivative of the uniform magnetization (M) displays a peak, which has previously been interpreted as reflecting random field Ising model critical heat capacity. We demonstrate that the ZFC dM/dT peak, in common with other indirect heat capacity measurements, instead reflects the effects of nonequilibrium ZFC long range order.

引用

页码：1198 / 1201

页数：4

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