ペロブスカイト型ボライドScNi_3B_(0.5)の合成及び性質

摘要

The search for a perovskite-type boride In the Sc-Ni-B system has been earned out. As a result, the chemical formula of the compound ScNi_3B_(0.5) was obtained for the first time. This compound has the cubic perovskite-type structure (space group: Pm3m) with the lattice parameter a=0.37760(7) nm. ScNi_3B_(0.5) exhibits metallic behavior down to 4.2 K. The magnetic susceptibility of ScNi_3B_(0.5) shows Pauli paramagnetism. No superconductivity appears down to the lowest temperature as determined by electric and magnetic measurements. The micro-Vickers hardness and oxidation resistivity in air are also studied for ScNi_3B_(0.5).