Superconducting and Magnetic Properties of Filled Skutterudite Compounds RERu4Sb12(RE=La,Ce,Pr,Nd and Eu).
Superconducting and Magnetic Properties of Filled Skutterudite Compounds RERu4Sb12(RE=La,Ce,Pr,Nd and Eu).
复制标题
DOI：
10.1143/jpsj.69.868
复制
发表时间：
2000-03
影响因子：
1.7
通讯作者：
N. Takeda;M. Ishikawa
中科院分区：
文献类型：
--
作者：
N. Takeda;M. Ishikawa
我们研究了Sb助熔法制备的RERu 4 Sb 12 的超导和磁性能，发现LaRu 4 Sb 12 在3.58 K以下具有超导性，PrRu 4 Sb 12 是Van Vleck顺磁体，在1.04 K以下变为超导。CeRu 4 Sb 12 是一种独特的物质，表现出中间价行为，在磁性中在100 K附近具有特征宽峰。高温下电阻率的磁化率和类似近藤行为。此外，在低温下的比热和电阻率中观察到非费米液体行为。 NdRu 4 Sb 12 和EuRu 4 Sb 12 分别在1.3 K和3.3 K处表现出磁转变。
We have studied superconducting and magnetic properties of RERu 4 Sb 12 prepared by an Sb-flux method and found that LaRu 4 Sb 12 is superconducting below 3.58 K and PrRu 4 Sb 12 is a Van Vleck paramagnet which becomes superconducting below 1.04 K. CeRu 4 Sb 12 is a unique substance which shows intermediate-valence behavior with a characteristic broad peak around 100 K in the magnetic susceptibility and Kondo-like behavior in the electrical resistivity at high temperatures. Furthermore, non-Fermi liquid behavior is observed in the specific heat and electrical resistivity at low temperatures. NdRu 4 Sb 12 and EuRu 4 Sb 12 show a magnetic transition at 1.3 K and 3.3 K, respectively.