Abstract
Abstract Temperature dependences of the soft phonon frequency and the damping constant in Tris-Sarcosine Calcium Chloride (TSCC) single crystal have been investigated between 5K and 100K by using a Fourier-transform far-infrared spectrometer. It has been observed that the soft phonon frequency decreases gradually and the damping constant increases as the transition temperature is approached from below The damping constant varies from 7cm−1 a 90K to less than 0.5cm−1 at 5K. It has been found that the damping constant is approximately proportional to temperature below about 60K.
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