Phase transitions and domain stabilities in biaxially strained (001) SrTiO3 epitaxial thin films

G. Sheng, Y. L. Li, J. X. Zhang, S. Choudhury, Q. X. Jia, V. Gopalan, D. G. Schlom, Z. K. Liu, L. Q. Chen

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Abstract

We applied phase-field approach to investigate both ferroelectric and antiferrodistortive transitions in (001) SrTiO3 epitaxial thin films that are strained biaxially. A domain/phase stability diagram of "misfit strain-temperature" was constructed for equibiaxially strained (001) SrTiO3 thin films, which exhibits significant differences from previous diagrams obtained using thermodynamic analysis of a single domain. For unequibiaxially strained (001) SrTiO3 thin films, "misfit strain-misfit strain" domain stability diagrams at several representative temperatures were obtained. The predicted phase transitions, domain stabilities, and domain structures in three different SrTiO3 thin films under either equibiaxial or unequibiaxial strains agree well with experimental observations.

Original languageEnglish (US)
Article number084113
JournalJournal of Applied Physics
Volume108
Issue number8
DOIs
StatePublished - Oct 15 2010

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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