NIR Raman Study of Ferroelectric Phase Transitions in Pyridinium Tetrafluoroborate

PAJĄK ZDZISŁAW Institute of Physics Adam Mickiewicz University, Umultowska 85, 61 614 Poznań, Poland

WOLAK JACEK Institute of Molecular Physics Polish Academy of Sciences, M. Smoluchowskiego 17 60 179 Poznań, Poland

POŁOMSKA MARIA Institute of Molecular Physics Polish Academy of Sciences, M. Smoluchowskiego 17 60 179 Poznań, Poland

Abstract

Raman scattering studies of powdered [C₅H₆N]⁺[BF₄]^- (PyBF₄) are presented in wide temperature range. Temperature changes of Raman profile parameters of bands related to external vibrations of PyBF₄ revealed anomalies at temperature of phase transitions: T₁≅ 200 K and T_C ≅ 238 K.

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NIR Raman Study of Ferroelectric Phase Transitions in Pyridinium Tetrafluoroborate

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NIR Raman Study of Ferroelectric Phase Transitions in Pyridinium Tetrafluoroborate

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