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.
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页码：11945 / 11948
页数：4
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