In-plane and out-of-plane ferroelectric instabilities in epitaxial SrTiO3 films

T. Yamada, J. Petzelt, A. K. Tagantsev, S. Denisov, D. Noujni, P. K. Petrov, A. MacKova, K. Fujito, T. Kiguchi, K. Shinozaki, N. Mizutani, V. O. Sherman, P. Muralt, N. Setter

研究成果: Article査読

31 被引用数 (Scopus)

抄録

The in-plane and out-of-plane ferroelectric instabilities in compressed (100)-epitaxial SrTiO3 films were examined by infrared reflection spectroscopy. The strongly stiffened in-plane soft mode frequency softened very slowly on cooling. On the other hand, the silent mode appeared at around 150 K, indicating an out-of-plane ferroelectric transition. This behavior points to a split of in-plane and out-of-plane ferroelectric instability temperatures due to the lowered symmetry of the SrTiO3 lattice caused by mechanical misfit strain. Infrared spectroscopy provides a possibility to detect such an effect in the strained epitaxial ferroelectric films.

本文言語English
論文番号157602
ジャーナルPhysical review letters
96
15
DOI
出版ステータスPublished - 2006
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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