Characterization and manipulation of mixed phase domains in highly-strained BiFeO3 thin films

Details Characterization and manipulation of mixed phase domains in highly-strained BiFeO3 thin films Characterization and manipulation of mixed phase domains in highly-strained BiFeO3 thin films

2011-12-29

arxiv.org/abs/1112.6305v2

Physics

Condensed Matter

Materials Science

27 pages, 8 figures

Scientific paper

The novel strain-driven morphotropic phase boundary (MPB) in highly-strained BiFeO3 thin film is featured by ordered mixed phase nanodomains (MPNs). Through scanning probe microscopy and synchrotron X-ray diffraction, eight structural variants of the MPNs are identified. Detailed polarization configurations within the MPNs are resolved using angular-dependent piezoelectric force microscopy. Guided by the obtained results, deterministic manipulation of the MPNs has been demonstrated by controlling the motion of the local probe. These findings are important for in-depth understanding of the ultrahigh electromechanical response arising from phase transformation between competing phases, enabling future explorations on the electronic structure, magnetoelectricity and other functionalities in this new MPB system.

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