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- Choi, Kyoung Jin
- Energy Conversion Materials Lab.
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Interfacial coherency and ferroelectricity of BaTiO(3)/SrTiO(3) superlattice films
- Author(s)
- Li, Y. L., Hu, S. Y., Tenne, D., Soukiassian, A., Schlom, D. G., Chen, L. Q., Xi, X. X., Choi, Kyoung Jin, Eom, C. B., Saxena, A., Lookman, T., Jia, Q. X.
- Issued Date
- 2007-12
- 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.
- Publisher
- AMER INST PHYSICS
- ISSN
- 0003-6951
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