Field-induced long-range order in the S=1 antiferromagnetic chain

被引：20
|
作者：
Sakai, T [1 ]
机构：
[1] Himeji Inst Technol, Fac Sci, Kamigori, Hyogo 6781297, Japan
来源：
PHYSICAL REVIEW B | 2000年 / 62卷 / 14期
关键词：
D O I：
10.1103/PhysRevB.62.R9240
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The quasi-one-dimensional S=1 antiferromagnet in magnetic field H is investigated with the exact diagonalization of finite chains and the mean-held approximation for the interchain interaction. In the presence of the single-ion anisotropy D, the full phase diagram in the HT plane is presented for H parallel to D and H perpendicular to D. The shape of the field-induced long-range ordered phase is revealed to be quite different between the two cases, as observed in the recent experiment of Ni(C5H14N2)(2)N-3(PF6) (NDMAP). The estimated ratio of the interchain and intrachain couplings of NDMAP (J'/J similar to 10(-3)) is consistent with the neutron-scattering measurement.
引用
收藏
页码：R9240 / R9243
页数：4
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