Interfacial coherency and ferroelectricity of BaTiO3∕SrTiO3 superlattice films | Zendy

Yulan Li | Zendy; Shenyang Hu | Zendy; D. A. Ténné | Zendy; A. Soukiassian | Zendy; Darrell G. Schlom | Zendy; LongQing Chen | Zendy; Xiaoxing Xi | Zendy; Kyoung Jin Choi | Zendy; ChangBeom Eom | Zendy; Avadh Saxena | Zendy; Turab Lookman | Zendy; Q. X. Jia | Zendy

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Interfacial coherency and ferroelectricity of BaTiO3∕SrTiO3 superlattice films

Author(s) -

Yulan Li,

Shenyang Hu,

D. A. Ténné,

A. Soukiassian,

Darrell G. Schlom,

LongQing Chen,

Xiaoxing Xi,

Kyoung Jin Choi,

ChangBeom Eom,

Avadh Saxena,

Turab Lookman,

Q. X. Jia

Publication year - 2007

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2823608

Subject(s) - superlattice , ferroelectricity , materials science , raman spectroscopy , condensed matter physics , orthorhombic crystal system , polarization (electrochemistry) , phase transition , diffraction , phase (matter) , optics , dielectric , optoelectronics , chemistry , physics , organic chemistry

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.open312

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