Development and characterization of Fe70Pd30 ferromagnetic shape memory splats

Freestanding Fe70Pd30 foils with a thickness of about 60 μm were fabricated using the splat-quenching technique. A shift of the martensitic transformation temperatures as a function of different annealing treatments (600 °C, 700 °C, 800 °C, 900 °C, 1000 °C for 15 min) was observed by temperature-dependent X-ray diffraction (XRD), resistance and magnetization measurements. The sample annealed at 800 °C showed the highest degree of crystallinity for the (200) fcc austenite peak and no secondary phases. Samples annealed below 800 °C kept austenite remainders even at −25 °C. The transformation temperatures, determined by all three-measurement methods, showed an increase with increasing annealing temperature.