LAUSR

Abstract Path dependent resistivity ( ρ ) relaxation behavior of FeRh 0.46 Pd 0.54 is studied in magnetic field (H) – temperature (T) parameter space. It shows that within the hysteresis region of zero field ρ – T curve, relaxation rate for AFM to FM forward transition during cooling is one order higher than the reverse transition during warming. However, below the hysteresis region, kinetics of the transition dominates and relaxation behavior depends on the path followed in H-T space to reach the measurement point. These measurements show that at low temperatures relaxation rate for AFM to FM transformation decreases irrespective of metastable phase fraction and it is maximum around 75 K. This is in contrast to relaxation behavior of supercooled/superheated metastable sate where relaxation rate depends on the available phase fraction for the transformation.