μSR study of the S=1/2 triangular lattice antiferromagnet AgNiO2

被引：0
|
作者：
H. Kikuchi
H. Nagasawa
M. Mekata
Y. Fudamoto
K.M. Kojima
G.M. Luke
Y.J. Uemura
H. Mamiya
T. Naka
机构：
[1] University of Tsukuba,Institute of Physics
[2] Fukui University,Department of Applied Physics
[3] Columbia University,Department of Physics
[4] National Research Institute for Metals,undefined
来源：
Hyperfine Interactions | 1999年 / 120-121卷
关键词：
Electrical Resistivity; Neutron Diffraction; Coherence Length; Magnetic Order; Triangular Lattice;
D O I：
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中图分类号：
学科分类号：
摘要：
AgNiO2, a model compound of an S=1/2 triangular lattice, was studied by muon spin relaxation in addition to ac, dc susceptibility, electrical resistivity and neutron diffraction. The relaxation rate shows a sharp peak at around TN=28 K followed by a sudden decrease of initial asymmetry indicating a magnetic ordering. Three internal fields ranging from 0.2 to 0.3 T were obtained from the muon precession period. However, a neutron diffraction experiment failed to detect any magnetic order at low temperatures. From these results, it was concluded that magnetic coherence is confined to small domain compared with the coherence length of neutron diffraction due to spin frustration.
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页码：623 / 627
页数：4
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