Neutron scattering and μSR studies on a Kondo lattice heavy fermion CeRuSn3
Neutron scattering and μSR studies on a Kondo lattice heavy fermion CeRuSn3
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近藤晶格重费米子 CeRuSn3 的中子散射和 μSR 研究
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
W. Kockelman
中科院分区：
文献类型：
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作者：
V. Anand;D. Adroja;A. Bhattacharyya;A. Hillier;D. Britz;A. Strydom;J. Taylor;A. Fraile;W. Kockelman
近藤晶格重费米子系统CeRuSn 3在T = 0.6 K（远低于平均近藤温度TK = 3.1 K）时表现出磁化率和比热的异常，这被认为与反铁磁有序或自旋玻璃化转变有关。我们的μ子自旋弛豫（μSR）数据显示，在CeRuSn 3中没有明显的长程磁序证据，直到84 mK。然而，它揭示了一个缓慢的自旋波动低于0.6 K，玻璃自旋动力学似乎更合适。非弹性中子散射数据揭示了由于晶场效应在6-8 meV附近的宽激发。
Kondo lattice heavy fermion system CeRuSn3 exhibits anomalies in magnetic susceptibility and specific heat at a temperature T ≈ 0.6 K (much lower than the average Kondo temperature TK ≈ 3.1 K) which are thought to be related to antiferromagnetic ordering or spin-glass transition. Our muon spin relaxation (μSR) data show no clear evidence of long range magnetic order in CeRuSn3 down to 84 mK. However, it reveals a slowing down of spin fluctuations below 0.6 K, and a glassy spin-dynamics seems more appropriate. The inelastic neutron scattering data reveal broad excitations around 6-8 meV due to the crystal field effect.