The influence of impurities and alloying in the Kondo semimetal CeNiSn as seen by μSR

被引:0
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作者
G.M. Kalvius
T. Takabatake
A. Kratzer
R. Wäppling
D.R. Noakes
S.J. Flaschin
F.J. Burghart
R. Kadono
I. Watanabe
A. Brückl
K. Neumaier
K. Andres
K. Kobayashi
G. Nakamoto
H. Fujii
机构
[1] Technische Universität München,Physik Department
[2] Hiroshima University,Faculty of Science
[3] Uppsala University,Department of Physics
[4] Virginia State University,Department of Physics
[5] Institute of Physical and Chemical Research (RIKEN),Bavarian Academy of Sciences
[6] Walther Meissner Institute,Faculty of Integrated Arts and Sciences
[7] Hiroshima University,undefined
来源
Hyperfine Interactions | 1997年 / 104卷
关键词
Relaxation Rate; Spin Glass; Heavy Fermion; Antiferromagnetic Order; CeCu;
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学科分类号
摘要
The temperature dependence of the muon spin relaxation rate \lambda was measured in two samples of CeNiSn with markedly different impurity content and in the quasi‐ternary compounds CePtxNi1-xSn (x=0.12,\ ,0.2) and CeCuxNi1-xSn (x=0.05,\ ,0.1,\ ,0.2) in order to study the development of magnetic correlations. No significant change in \lambda was found for the two samples of CeNiSn although their low temperature specific heat differs strongly. Hence μSR probes the intrinsic magnetic properties of the spin‐liquid state of CeNiSn. Replacing Ni with up to 20% Pt results only in minor changes of \lambda. In contrast, a strong effect is seen when Ni is replaced by Cu. Already at 10% Cu the system forms a spin‐glass‐like state below 0.9 K. At 20% Cu this behavior is strengthened, but antiferromagnetic order of the type seen in CePtSn or CePdSn is not reached. The results show further that the change in 4f hybridization initiated by volume expansion in the alloyed samples is not the dominating mechanism strengthening the magnetic correlations. Decisive is the increase in d electron density when replacing Ni by Cu.
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页码:157 / 164
页数:7
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