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Inne
Vibrational study of the structural phase transitions in 4-aminopyridinium tetrachloroantimonate(III) (4-APCA) ferroelectric crystal by infrared spectroscopy.
Autorzy
Rok wydania
2007
Czasopismo
Numer woluminu
45
Strony
36-45
DOI
10.1016/j.vibspec.2007.06.002
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Infrared spectra of powdered 4-aminopyridinium tetrachloroantimonate(III) [4-NH2C5H4NH][SbCl4] (abbreviation: 4-APCA) in the region of the internal vibrations of the 4-aminopyridinium cation (3600 and 400 cm−1) and in the temperature interval 10–300 K covering three structural phase transitions are presented and discussed. The results confirm the order–disorder mechanism of the phase transition at 245 K. The paraelectric–ferroelectric phase transition at 271 K is hardly visible in the infrared spectra, which is in agreement with its “displacive” nature of the transition suggested by the single crystal X-ray and ac calorimetric studies.
Słowa kluczowe
Halogenoantimonates(III), Vibrational spectra, Phase transition, Ferroelectric
Adres publiczny
https://doi.org/10.1016/j.vibspec.2007.06.002
Strona internetowa wydawcy
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