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- W2018095915 abstract "Raman spectrum of (111) oriented BiFeO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> (BFO) thin film was studied in temperature range between 27 °C - 500 °C. Observed three sharp A <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1</sub> Raman modes at 136, 162, and 212 cm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-1</sup> show anomalous changes in frequencies, line width and integrated intensity between span of temperature range 250-400 °C i.e. around magnetic phase transition (TN). The sign and magnitude of such anomalous behavior appears to be an experimental evidence of perturbation in antiferromagnetic ordering coupled with octahedral tilting reveals strong spin-phonon coupling around TN. The soft mode behavior of A1 Raman modes at 136 and 162 cm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-1</sup> was observed directly and reveals a decrease of the Curie temperature (T <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> ) of the strained film, which was originally suggested by M. S. Kartavtseva and co workers [Thin Solid Films, 515 (2007) 6416]." @default.
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- W2018095915 date "2008-02-01" @default.
- W2018095915 modified "2023-09-30" @default.
- W2018095915 title "Phonon anomalies in multiferroic BiFeO3 epitaxial thin films with rhombohedral (R3c) symmetry" @default.
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- W2018095915 doi "https://doi.org/10.1109/isaf.2008.4693775" @default.
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