Polar domains in lead titanate films under tensile strain

Thin films of PbTiO3, a classical ferroelectric, have been grown under tensile strain on single-crystal substrates of DyScO3. The films, of only 5 nm thickness, grow fully coherent with the substrate, as evidenced by synchrotron x-ray diffraction. A mapping of the reciprocal space reveals intensity...

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Bibliographic Details
Published in:	Physical review letters Vol. 96; no. 12; p. 127602
Main Authors:	Catalan, G, Janssens, A, Rispens, G, Csiszar, S, Seeck, O, Rijnders, G, Blank, D H A, Noheda, B
Format:	Journal Article
Language:	English
Published:	United States 31-03-2006
Subjects:	DYSPROSIUM COMPOUNDS FERROELECTRIC MATERIALS LEAD COMPOUNDS MAPPING MATERIALS SCIENCE MODULATION MONOCRYSTALS PIEZOELECTRICITY POLARIZATION SCANDIUM OXIDES STRAINS SUBSTRATES SYMMETRY THICKNESS THIN FILMS TITANATES X-RAY DIFFRACTION
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Summary:	Thin films of PbTiO3, a classical ferroelectric, have been grown under tensile strain on single-crystal substrates of DyScO3. The films, of only 5 nm thickness, grow fully coherent with the substrate, as evidenced by synchrotron x-ray diffraction. A mapping of the reciprocal space reveals intensity modulations (satellites) due to regularly spaced polar domains in which the polarization appears rotated away from the substrate normal, characterizing a low-symmetry phase not observed in the bulk material. This could have important practical implications since these phases are known to be responsible for ultrahigh piezoelectric responses in complex systems.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.96.127602