Abstract
The magnetic and magnetotransport properties of the doped manganite with nominal composition La0.2Pr0.5Ca0.3MnO3 are studied around the first order insulator-metal transition. The region across the first order transition is found to be highly metastable with the coexisting metallic and insulating phases. The sample shows anomalous transport and magnetic behaviors, which is related to the field-induced arrested state in the region of phase separation. A large magnetoresistance is also present in the sample at the lowest temperature of measurements (well below the first order transition), which is possibly connected to the effect of electron tunneling through grain boundaries.
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