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Multivalued memory effects in electronic phase-change manganites controlled by Joule heating

H. Song, M. Tokunaga, S. Imamori, Y. Tokunaga, T. Tamegai

cond-mat.str-elarXiv:cond-mat/0607795

Abstract

Non-volatile multivalued memory effects caused by magnetic fields, currents, and voltage pulses are studied in Nd0.65Ca0.35MnO3 and (Nd1-ySmy)0.5Sr0.5MnO3 (y=0.75) single crystals in the hysteretic region between ferromagnetic metallic and charge-ordered insulating states. The current/voltage effects observed in this study are explained by the self-heating effect, which enable us to control the colossal electroresistance effects. This thermal-cycle induced switching between electronic solid and liquid states can be regarded as electronic version of atomic crystal/amorphous transitions in phase-change chalcogenides.

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