Itinerant electron magnetism of η-carbides Co6M6C and Ni6M6C (M = Mo and W)
Itinerant electron magnetism of η-carbides Co6M6C and Ni6M6C (M = Mo and W)
复制标题
η-碳化物 Co6M6C 和 Ni6M6C (M = Mo 和 W) 的巡回电子磁
DOI：
10.1016/j.jallcom.2012.10.161
复制
发表时间：
2013
影响因子：
6.2
通讯作者：
T. Waki
中科院分区：
文献类型：
--
作者：
Asdim;K. Ichinose;T. Inomata;H. Masuda;T. Yoshida;M. Suzuki;浅田拓海・湯浅伸・鈴木教之・増山芳郎;T. Waki
研究了具有立方结构的η-碳化物Co6M6C和Ni6M6C(M=Mo和W)的磁学、输运和热学性质。镍基化合物Ni6Mo6C和Ni6W6C是具有温度无关磁化率的泡利顺磁。钴基化合物Co6Mo6C和Co6W6C的磁化率随温度的变化而增强。Co6Mo6C在最低温度下保持顺磁性，而Co6W6C在46K经历反铁磁型相变。在最低温度下，Co6W6C在20-30℃发生了变磁相变。磁化率、电阻率和电子比热的增强之间的相关性表明，这些化合物中存在中等程度的电子关联。
Magnetic, transport, and thermal properties of metallic η-carbides Co6M6C and Ni6M6C (M=Mo and W) with the cubic Ni6Mo6C-type structure have been characterized. The Ni-based compounds Ni6Mo6C and Ni6W6C are Pauli paramagnets with temperature-independent susceptibilities. Susceptibilities of the Co-based compounds Co6Mo6C and Co6W6C are enhanced and temperature-dependent. Co6Mo6C remains paramagnetic down to the lowest temperature, while Co6W6C undergoes an antiferromagnetic-type transition at 46K. A metamagnetic transition was observed for Co6W6C at 20–30T at the lowest temperatures. The correlation among the enhancements in the susceptibility, the resistivity, and the electronic specific heat suggests the presence of moderate electron correlation in these compounds.