Temperature-driven evolution of hierarchical nanodomain structure in tetragonal-like BiFeO3 films

Details Temperature-driven evolution of hierarchical nanodomain structure in tetragonal-like BiFeO3 films Temperature-driven evolution of hierarchical nanodomain structure in tetragonal-like BiFeO3 films

2011-12-21

arxiv.org/abs/1112.4920v1

Physics

Condensed Matter

Materials Science

accepted to Applied Physics Letters for publication

Scientific paper

Transmission electron microscopy study of tetragonal-like BiFeO3 films reveals a hitherto unreported hierarchical nanodomain structure. The 30-50 nm wide stripe domains with {110} domain walls consist of a substructure of lamellar nanodomains of 8-10 nm width in a herringbone-like arrangement. In situ heating and cooling reveals a reversible transition from the hierarchical nanodomain structure to a tweed-like domain structure which is accompanied by a first-order phase transition near 120 {\deg}C with a thermal hysteresis.

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