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Strain dependence of transition temperatures and structural symmetry of BiFeO3 within the tetragonal-like structure

TitleStrain dependence of transition temperatures and structural symmetry of BiFeO3 within the tetragonal-like structure
Publication TypeJournal Article
Year of Publication2012
AuthorsSiemons W, MacDougall GJ, Aczel AA, Zarestky JL, Biegalski MD, Liang S, Dagotto E, Nagler SE, Christen HM
Journal TitleApplied Physics Letters
Volume101
Pages212901
Date Published11
Type of ArticleArticle
ISBN Number0003-6951
Accession NumberWOS:000311477600049
Keywordsmechanism, polarization, thin-films
Abstract

The influence of strain-imposed in-plane lattice symmetry on the structural and magnetic properties of tetragonal-like BiFeO3 is investigated by x-ray and elastic neutron scattering. We find that an increase in the in-plane distortion results in an increase of the Neel temperature from 313 +/- 5K to 324 +/- 3K for films grown on YAlO3 and LaAlO3, respectively. The change in magnetic ordering temperature is reproduced in three-dimensional Heisenberg Monte-Carlo simulations. These results show that strain cannot be treated as a single scalar number or simply as a direct consequence of the lattice mismatch between the film material and the substrate. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4767335]
URL<Go to ISI>://WOS:000311477600049
DOI10.1063/1.4767335
Alternate JournalAppl. Phys. Lett.