Muon spin relaxation in S=1/2 double chain system KCuCl3

被引：18

作者：

Higemoto, W

Tanaka, H

Watanabe, I

Nagamine, K

机构：

[1] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[2] Tokyo Inst Technol, Fac Sci, Dept Phys, Tokyo 1520033, Japan

[3] High Energy Accelerator Res Org, Inst Mat Struct Sci, Meson Sci Lab, Oho, Ibaraki 3050801, Japan

来源：

PHYSICS LETTERS A | 1998年 / 243卷 / 1-2期

关键词：

KCuCl3; double spin chain; frustrated spin state; singlet ground state; mu SR;

D O I：

10.1016/S0375-9601(98)00177-7

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In muon spin relaxation studies on the S = 1/2 double chain system KCuCl3, which is thought to have a spin singlet ground state with a finite spin gap, we found that the muon spin becomes strongly depolarized below 20 K. Under a longitudinal magnetic field of 3800 G, the temperature dependence of the muon spin relaxation rate shows a cusp at similar to 5 K, where the relaxation rate increases with increasing longitudinal magnetic fields, suggesting the existence of a frustrated spin state. We believe that the origin of the muon spin relaxation is related to the electron spins of the CU2+ ions which form the double chains or formation of the paramagnetic muon state. Possible other reasons of the muon spin relaxation are also discussed. (C) 1998 Elsevier Science B.V.

引用

页码：80 / 84

页数：5

共 20 条

[1] OBSERVATION OF A SPIN GAP IN SRCU2O3 COMPRISING SPIN-1/2 QUASI-1D 2-LEG LADDERS [J].