Nuclear magnetic resonance in high magnetic fields: Study of singlet-ground-state due to 1-D quantum spin effect

被引：1

作者：

Chiba, M

Ajiro, Y

Satoh, E

Kubo, T

机构：

[1] FUKUI UNIV,DEPT APPL PHYS,FUKUI 910,JAPAN

[2] NARA UNIV EDUC,NARA 630,JAPAN

来源：

PHYSICA B | 1996年 / 216卷 / 3-4期

关键词：

D O I：

10.1016/0921-4526(95)00513-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In one-dimensional (1-D) magnets the singlet-ground-state (SGS) due to the quantum spin effect is one of the most interesting phenomena. The temperature and the field dependences of the proton spin-lattice relaxation under magnetic fields up to 15 T have been observed for SGS materials, namely, NENP (Haldane system) and CuCl2(gamma-picoline)(2) (alternating antiferromagnetic chain). The results clearly show the excitation of SGS with a characteristic energy gap in the magnetic excited state. The observed relaxation rate is discussed in terms of the number of magnetic excitons in focussing on the dissimilarity between two systems.

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页码：344 / 346

页数：3

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