THERMODYNAMIC AND MAGNETIC-PROPERTIES OF THE S=1 HEISENBERG CHAIN NI(C2H8N2)(2)NI(CN)(4) - EXPERIMENTS AND THEORY

被引：80
作者：
ORENDAC, M
ORENDACOVA, A
CERNAK, J
FEHER, A
SIGNORE, PJC
MEISEL, MW
MERAH, S
VERDAGUER, M
机构：
[1] UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611
[2] UNIV FLORIDA,CTR ULTRALOW TEMP RES,GAINESVILLE,FL 32611
[3] UNIV PARIS 06,F-75252 PARIS 05,FRANCE
来源：
PHYSICAL REVIEW B | 1995年 / 52卷 / 05期
关键词：
D O I：
10.1103/PhysRevB.52.3435
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Specific-heat and susceptibility studies of powdered Ni(C2H8N2)(2)Ni(CN)(4) have been performed from 50 mK to 20 K, and magnetization measurements have been conducted at 4.3 K in magnetic fields up to 6 T. The results show that Ni(C2H8N2)(2)Ni(CN)(4) is an S = 1 antiferromagnetic Heisenberg chain with a strong planar anisotropy. The low-temperature specific-heat data show a contribution due to magnetic excitations which are interpreted within the framework of a strong coupling theory of (anti)excitons.
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页码：3435 / 3440
页数：6
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