Abstract
We report the effect of electric current and magnetic field, separatelyand in conjugation, on the transport behaviour of patternedLa0.7Ce0.3MnO3 thin films. In the absence of a magnetic field, a significant reduction in peak resistance(Rp) was found with increasing bias current. This effect is also present whena magnetic field is applied, though the magnitude of the electroresistance(ER = [R(I = 0.05 µA)−R(I = 50 µA)]/R(I = 50 µA)) decreases. The metal–insulator transition temperature(Tp) increases both with increasing current and with magnetic field. We observe an interestingcorrelation between electric current and magnetic field: the magnetoresistance(MR = [RH = 0−RH = 1 T]/RH = 0) decreases with increasing bias current, while ER decreases withincreasing magnetic field. Both ER and MR show a maximum nearTp. The interesting correlation between these two effects suggests that both these effects arisefrom the same origin.
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