Abstract
MnSbPt films containing 50 at%Mn, 44 at%Sb, and 6 at% Pt were prepared by RF sputtering. XRD, TEM, and NMR studies revealed that in the as-deposited state, MnSbPt films had a disordered hexagonal structure, and that after annealing at 300°C NiAs-type structure and an fee-type structure were formed, promoting phase separation in MnSbPt films with a giant magneto-optical Kerr rotation. The assumption of a two-phase mixture of NiAs and fee structures is difficult to explain the giant magneto-optical effect in the short wevelength region (∼500 nm) for MnSbPt films. The giant magneto-optical effect is thought to be associated with the microstructure due to the phase separation process.
