Itinerant electron magnetism of eta-carbides Co6M6C and Ni6M6C (M = Mo and W)

作者：Waki T^*; Furusawa D; Tabata Y; Michioka C; Yoshimura K; Kondo A; Kindo K; Nakamura H

来源：Journal of Alloys and Compounds, 2013, 554: 21-24.

DOI：10.1016/j.jallcom.2012.10.161

• Transition metal alloys and compounds
• Solid state reaction
• Electrical transport
• Heat capacity
• Magnetisation
• High magnetic fields
• Magnetic measurements

Magnetic, transport, and thermal properties of metallic eta-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 46 K. A metamagnetic transition was observed for Co6W6C at 20-30 T 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.

• 出版日期2013-3-25