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

W. Siemons, G. J. MacDougall, A. A. Aczel, J. L. Zarestky, M. D. Biegalski, S. Liang, E. Dagotto, S. E. Nagler, H. M. Christen

Research output: Contribution to journalArticlepeer-review


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 Néel temperature from 313 ± 5 K to 324 ± 3 K 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.

Original languageEnglish (US)
Article number212901
JournalApplied Physics Letters
Issue number21
StatePublished - Nov 19 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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