We report the observation of extremely high dielectric permittivity exceeding 10 9 and magnetocapacitance of the order of 10 4 % in La 0.875 Sr 0.125 MnO 3 single crystal. This phenomenon is observed below 270 K, and it exhibits a history dependence. These effects may be the consequence of strong competition and interplay among the charge, orbital, and spin degrees of freedom, resulting in nanoscale charge and spin dynamic inhomogeneities in the prepercolation regime of the phase segregation.
Scanning probe microscopy was used to create and to detect local bias induced charged states in La0.89Sr0.11MnO3 single crystals at room temperature. The lifetime of these nonequilibrium states exceeds 100 h. These bias induced states display also a ferroelectriclike hysteresis with piezoelectric contrast reversed by the applied field. Such states showing reversible multifunctional properties are attractive for modern semiconductor technology with its focus on nonvolatile random-access memories.
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