Spin fluctuations in S=1/2 double-linear-chain gamma-LiV2O5 studied by Li-7 NMR

被引：30

作者：

Fujiwara, N ^{[1
]}

Yasuoka, H ^{[1
]}

Isobe, M ^{[1
]}

Ueda, Y ^{[1
]}

Maegawa, S ^{[1
]}

机构：

[1] KYOTO UNIV,GRAD SCH HUMAN & ENVIRONM STUDIES,KYOTO 60601,JAPAN

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.55.R11945

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The nuclear spin-lattice relaxation rate (1/T-1) of Li-7 nuclei has been measured in a spin S=1/2 double-linear-chain system with exchange interaction J=308 K, gamma-LiV2O5, in the temperature range from 280 K down to 0.5 K. We observed that 1/T-1 shows the minimum at about 0.1 J. The increase of 1/T-1 below and above 0.1 J are well explained by considering the contribution from the staggered-spin fluctuation and the uniform-spin fluctuation, respectively. Especially, the increase of 1/T-1 below 0.1 J suggests the appearance of the logarithmic correction effect which has been recently predicted by theoretical works in an isotropic Heisenberg linear chain.

引用

页码：11945 / 11948

页数：4

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