S=1 Heisenberg chain Ni(C2H8N2)(2)Ni(CN)(4) in the frame of strong coupling theory.

被引：7
|
作者：
Orendacova, A
Orendac, M
Feher, A
Meisel, MW
Signore, PJC
Merah, S
Verdaguer, M
机构：
[1] UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611
[2] UNIV PARIS 06,F-75252 PARIS 05,FRANCE
来源：
CZECHOSLOVAK JOURNAL OF PHYSICS | 1996年 / 46卷
关键词：
D O I：
10.1007/BF02570961
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Our previous experimental study has identified Ni(C2H8N2)(2)Ni(CN)(4) (NENC) as an S = 1 antiferromagnetic (AF) Heisenberg chain with strong planar anisotropy D/k(B) = 6 K and D/\J\ = 7.5. The position of the system in the (D,lambda) phase diagram ((7.5,1) in units J) has enabled die study of excitons as elementary excitations from the singlet ground state (SGS). Strong coupling theory for the thermodynamics of 1d S = 1 large - D systems is used for the re - analysis of specific heat and susceptibility data. The influence of in - plane anisotropy and exciton interactions is discussed.
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页码：1939 / 1940
页数：2
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