Watching domains grow: In-situ studies of polarization switching by combined scanning probe and scanning transmission electron microscopy
- Watching domains grow: In-situ studies of polarization switching by combined scanning probe and scanning transmission electron microscopy
- 장혜정; S.V. Kalinin; 양승열; P.Yu; S.Bhattacharya; P.P.Wu; N.Balke; S.Jesse; L.Q.Chen; R.Ramesh; S.J.Pennycook; A.Y.Borisevich
- Ferroelectrics; In situ TEM; STEM; Switching; Domain growth; BiFeO3; SPM
- Issue Date
- Journal of applied physics
- VOL 110, NO 5, 052014-1-052014-6
- 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˚ 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 are 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.
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