Quadrupole Relaxation of ^{79}Br Nuclei in Ferroelectric (CH_{3})_{4}NCdBr_{3} (TMCB)

• Authors: D.F. Baisa , E.D. Chesnokov , Z. Czapla
• Languages of publication: EN

Abstracts

EN

Investigations of temperature dependence of a nuclear quadrupole spin-lattice relaxation time of ^{79}Br nuclei in ferroelectric (CH_{3})_{4}NCdBr_{3} are presented. It is shown that in paraelectric phase in the vicinity of phase transition temperature relaxation process is determined by critical fluctuations of electric field gradient. In ferroelectric phase relaxation is related to three different mechanisms, namely: lattice vibrations, CH_{3¯} group reorientations and TMA cation motions. According to the results of measurements it is concluded that the phase transition is connected with ordering of TMA cations.

Keywords

EN

64.70.Kb

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1994
• Volume: 86
• Issue: 3
• Pages: 357-361

Dates

published

1994-05

received

1994-04-13

Contributors

author

D.F. Baisa

• Institute of Physics, Ukrainian Acad. Sci., Prospekt Nauki 46, 252028 Kiev, Ukraine

author

E.D. Chesnokov

• Institute of Physics, Ukrainian Acad. Sci., Prospekt Nauki 46, 252028 Kiev, Ukraine

author

Z. Czapla

• Institute of Experimental Physics, University of Wrocław, M. Borna 9, 50-204 Wrocław, Poland