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Inne
Raman studies of the internal modes in ferroelectric crystal (CH3NH3)5Bi2Cl11 (MAPCB).
Autorzy
Rok wydania
1992
Czasopismo
Numer woluminu
125
Strony
401-406
DOI
10.1088/0953-8984/4/11/023
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The Raman spectra of (CH3NH3)5Bi2Cl11 in the range of internal frequency modes of the (CH3NH3)+ cation (75-1700, 2700-3500 cm-1) have been recorded in the three phases and at room temperature for the partially deuterated (CD3NH3) compound. The CH3 (or CD3) and NH3+ bands of the spectra have been identified and compared with Raman results available for other methylammonium crystals. The temperature dependences of these internal modes were measured in the range 100-360 K and their temperature behaviour has been explained by a model of linear and quadratic pseudospin-phonon interactions.
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