Microstructure and magnetic properties of FeRh thin films with Pt doping

In this paper, the structure and magnetic properties of FeRh alloy thin films with a small amount of Pt doping fabricated onto a glass substrate by sputtering are investigated systematically. XRD results show that the diffraction pattern of as-deposited film exhibits only nonmagnetic γ phase. After annealing, the disordered γ phase transforms to an ordered α′ phase. The temperature dependence of saturation magnetization of different annealing times and Pt contents are characterized. The phase transition temperature increases as the Pt component is increased, but the saturation magnetization reduces as the Pt component is increased. These results may be caused by the growth of the disordered γ phase.