Abstract
Temperature dependence of the 133Cs nuclear magnetic resonance in an LiCsSO4 single crystal grown by the slow evaporation method has been investigated by employing an FT NMR spectrometer. From the experimental data, the quadrupole coupling constant, asymmetry parameter and direction of the EFG tensor were determined in the temperature range from 180 K to 400 K. The 133Cs NMR spectra shows a phase transition at 200 K which is connected with the formation of three kinds of ferroelastic domain. The obtained results are explained by the existence of these three domains, rotated with respect to each other by 60° around the c-axis. The nuclear quadrupole coupling constant and asymmetry parameter obtained as functions of temperature for 133Cs in an LiCsSO4 single crystal are described by the linear equations and , respectively, in the temperature range 180-400 K.
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