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.
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收藏
页码：1198 / 1201
页数：4
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