Reduction of longitudinal ultrasonic oscillations in NaClO[3] crystals

Abstract

The authors study reduction of longitudinal ultrasonic oscillations (internal friction Q{-1} and logarithmic decrement [delta]) in NaClO[3] crystals within the temperature range of 78-525 К and relative amplitudes of oscillatory deformation of 10{-7} -10{-5} according to the method of compound piezoelectric vibrator at the frequencies of =10[5] Hz. Q{-1} maximums under the temperatures of 110 К, 240 К, 260 К, =400 К and its fast growth under the temperature over 500 К are revealed as well as athermic peak of ? in the region of small deformation amplitudes(near 10{-7}).