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

doi:10.1103/PhysRevLett.96.157602

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

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

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.

Original language	English
Article number	157602
Journal	Physical review letters
Volume	96
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.96.157602
Publication status	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.96.157602

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title = "In-plane and out-of-plane ferroelectric instabilities in epitaxial SrTiO3 films",

abstract = "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.",

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

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doi = "10.1103/PhysRevLett.96.157602",

language = "English",

volume = "96",

journal = "Physical Review Letters",

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T1 - In-plane and out-of-plane ferroelectric instabilities in epitaxial SrTiO3 films

AU - Yamada, T.

AU - Petzelt, J.

AU - Tagantsev, A. K.

AU - Denisov, S.

AU - Noujni, D.

AU - Petrov, P. K.

AU - MacKova, A.

AU - Fujito, K.

AU - Kiguchi, T.

AU - Shinozaki, K.

AU - Mizutani, N.

AU - Sherman, V. O.

AU - Muralt, P.

AU - Setter, N.

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

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ER -

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

Abstract

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