Abstract
Crystal structures and magnetic properties of Pt–Mn–Sb alloys have been investigated by means of X-ray and magnetic analysis. It has been found that a new C1b type compound PtMnSb exists in the Pt–Mn–Sb system and forms solid solutions in the compositional range of Pt1.00Mn1.00Sb1.00∼Pt0.94Mn1.12Sb0.94. These alloys in solid solution have lattice parameters of about 6.196∼6.228 Å at room temperature, saturation magnetizations of 62.0∼64.0 e.m.u./g at absolute zero, effective Bohr magneton numbers of 3.73∼4.14 μB per Mn atom at absolute zero, and Curie temperatures of 522°∼595°K . The magnetic susceptibility of these alloys has been found to satisfy the Curie-Weiss law above the Curie temperature.
