Watching domains grow: In-situ studies of polarization switching by combined scanning probe and scanning transmission electron microscopy

Title
Watching domains grow: In-situ studies of polarization switching by combined scanning probe and scanning transmission electron microscopy
Authors
장혜정S.V. Kalinin양승열P.YuS.BhattacharyaP.P.WuN.BalkeS.JesseL.Q.ChenR.RameshS.J.PennycookA.Y.Borisevich
Keywords
Ferroelectrics; In situ TEM; STEM; Switching; Domain growth; BiFeO3; SPM
Issue Date
2011-09
Publisher
Journal of applied physics
Citation
VOL 110, NO 5, 052014-1-052014-6
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/40421
ISSN
0021-8979
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KIST Publication > Article
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