Electrical Resistivity of NiAl, CoAl, NiGa, and CoGa

Abstract

The electrical resistivities of NiAl, CoAl, NiGa, and CoGa were measured at 4.2° and 297°K by the usual potentiometric method. The variations of resistivities of these intermetallic compounds with temperature and composition indicate that the compounds are metallic, although not good conductors, and that the point‐defect concentration present in these materials is important in considerations of the electrical transport properties. The variations of resistivities with composition indicated that the point defects in NiAl, CoAl, and CoGa tend to cluster as the composition departs from stoichiometry.