Time dependant switchover of competing phases in La0.40Pr0.10Ca0.50MnO3

Abstract By employing impedance spectroscopy, switchover of one phase (R LF ) into another phase (R HF ) is reported with time for polycrystalline La 0.40 Pr 0.10 Ca 0.50 MnO 3 compound. An irreversible increase in the impedance is explored in terms of the competition of two coexisting contending phases. An increasing along with switchover tendency of the impedance of R LF with R HF with time is conferred having different kinetics of the two coexisting competing phases. The increase in the resistance of the La 0.40 Pr 0.10 Ca 0.50 MnO 3 sample is originated in terms of the polar nature of R HF (O-deficient related traps) and structural as well as trap associated nature of R LF .