Abstract

Local resistive switching was observed using AFM equipped with conducting tip addressing ∼15 unit cells in high-quality BiFeO3 single crystal grown from a non-stoichiometric melt. The switching appeared under high-vacuum conditions above 340 K and the studies at various temperatures yield the activation energy of 0.74 eV. The field-induced changes in the resistivity were ascribed to the presence of localized oxygen vacancies as a consequence of the mixed valence of Fe2+/Fe3+ ions.

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