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Choi, Kyoung Jin
Energy Conversion Materials (EcoMAT) Lab
Research Interests
  • Solar cells, thermoelectrics, piezoelectric

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Interfacial coherency and ferroelectricity of BaTiO(3)/SrTiO(3) superlattice films

Cited 31 times inthomson ciCited 27 times inthomson ci
Title
Interfacial coherency and ferroelectricity of BaTiO(3)/SrTiO(3) superlattice films
Author
Li, Y. L.Hu, S. Y.Tenne, D.Soukiassian, A.Schlom, D. G.Chen, L. Q.Xi, X. X.Choi, Kyoung JinEom, C. B.Saxena, A.Lookman, T.Jia, Q. X.
Keywords
DIELECTRIC-PROPERTIES; DOMAIN-STRUCTURES; THIN-FILMS; ENHANCEMENT; POLARIZATION; DEPOSITION
Issue Date
2007-12
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.91, no.25, pp.252904-1 - 252904-3
Abstract
We studied the phase transitions, domain morphologies, and polarizations in BaTiO(3)/SrTiO(3) superlattices grown on SrTiO(3) substrates. Using the phase field approach, we discovered the remarkable influence of film/substrate interfacial coherency on the ferroelectricity of the SrTiO(3) layers within a superlattice: it is an orthorhombic ferroelectric for an incoherent interface while it exhibits only induced polarization by the adjacent BaTiO(3) layers for a coherent interface. We presented the domain morphologies within individual BaTiO(3) and SrTiO(3) layers which have different ferroelectric symmetries. The results are compared to ultraviolet Raman spectroscopy and variable temperature x-ray diffraction measurements.
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DOI
10.1063/1.2823608
ISSN
0003-6951
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MSE_Journal Papers
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