Abstract
The electronic, magnetic, and thermal properties of polycrystalline Pr0.65Ca0.35−xSrxMnO3 (x=0–0.35) perovskites have been elaborately investigated. A huge enhancement of magnetoresistance (MR) (10% at H=100 Oe and 99% at H=0.5 T) has been observed in an x=0.1 sample around the metal-insulator (MI) transition temperature (TMI∼80 K) which is induced by the phase separation (PS). This study opens the possibility to search for the polycrystalline colossal magnetoresistive materials with a very high MR at low magnetic fields on the basis of PS phenomena for potential applications.
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