The effect of La substitution and magnetic field on non-Fermi-liquid behaviour in CeRu4Sb12
The effect of La substitution and magnetic field on non-Fermi-liquid behaviour in CeRu4Sb12
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La 取代和磁场对 CeRu4Sb12 非费米液体行为的影响
DOI：
10.1088/0953-8984/13/26/312
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Ishikawa
中科院分区：
文献类型：
--
作者：
N. Takeda;M. Ishikawa
具有填充型Skutterudite结构的CeRu4Sb12在常压下的低温比热和电阻率方面表现出一种新的非费米液体(NFL)行为。我们研究了La替代和磁场对NFL态的影响，发现无论是施加磁场还是少量La替代都很容易破坏NFL态。在磁场中，C/T变得强烈压低，在1K以下几乎保持不变，ρ(T)遵循T2定律，这意味着在高磁场下费米-液态会恢复。根据磁化率、电阻率和比热的测量结果，讨论了临界涨落的类型。
CeRu4Sb12 with the filled skutterudite structure exhibits a novel non-Fermi-liquid (NFL) behaviour in the low-temperature specific heat and electrical resistivity at ambient pressure. We investigated the effect of La substitution and magnetic field on the NFL state and found that it can be easily destroyed either by the application of a magnetic field or by a small degree of La substitution. In magnetic fields, C/T becomes strongly depressed and nearly constant below 1 K and ρ(T) turns to following a T2-law, implying that the Fermi-liquid state recovers in high magnetic fields. The type of critical fluctuation is discussed on the basis of the results of magnetic susceptibility, electrical resistivity and specific heat measurements.