Effect of Transition Metal Solutes on Magnetic Properties of Pt

Abstract

Magnetic susceptibility and NMR measurements on Pt with addition of 3d, 4d and 5d transition metal solutes were carried out at helium temperature to study the effect of nonmagnetic and magnetic solutes on the magnetic properties of Pt. The change of the host d band susceptibility and its valence number dependence were obtained and compared with the theory by Asano et al . for nonmagnetic solute alloy. From this comparison, it was concluded that the change of the host d band susceptibility arises from the change of the density of states at E F of Pt. As for magnetic alloys, it was found that the effect due to the polarization of conduction electrons by the localized magnetic moment of solute is predominant in the alloys with low T K ( Pt Co, Pt Fe), whereas in the alloy with high T K ( Pt Cr), the same mechanism as that of nonmagnetic alloy becomes important.