We have simultaneously measured the longitudinal resistivity and the Hall resistivity for the magnetoresistive La0.67Ca0.33MnO3 thin films as a function of temperature in temperature region of colossal magnetoresistance at several magnetic fields. Two reversions of the Hall sign with reducting temperature have been observed. The temperature at which the reversion of the Hall sign occurs shifts to the higher temperature with the increase of applied magnetic field. It was argued that the coexistence of two types of conduction mechanisms, the itinerant electron and small polaron, competing with each other, might be responsible for the two reversions of the Hall sign.

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