Physics – Condensed Matter – Materials Science
Scientific paper
2011-04-26
J. Appl. Phys. 110, 052014 (2011)
Physics
Condensed Matter
Materials Science
Scientific paper
10.1063/1.3623779
Ferroelectric domain nucleation and growth in multiferroic BiFeO3 films is observed directly by applying a local electric field with a conductive tip inside a scanning transmission electron microscope. The nucleation and growth of a ferroelastic domain and its interaction with pre-existing 71^{\circ} domain walls are observed and compared with the results of phase-field modeling. In particular, a preferential nucleation site and direction-dependent pinning of domain walls is observed due to slow kinetics of metastable switching in the sample without a bottom electrode. These in-situ spatially-resolved observations of a first-order bias-induced phase transition reveal the mesoscopic mechanisms underpinning functionality of a wide range of multiferroic materials.
Balke Nina
Bhattacharya Saswata
Borisevich Albina Y.
Chang Hyejung
Chen Long Q.
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