U. Straube et H. Beige, DETERMINATION OF SOME COMPLEX ELASTIC AND ELECTROMECHANICAL PROPERTIES OF KDP, Journal de physique. IV, 6(C8), 1996, pp. 437-440
The described method allows the determination of velocity and attenuat
ion variations introduced by low frequency alternating stresses and el
ectric fields. Uniaxial stress is produced with a high load piezoelect
ric actuator and controlled with a strain gauge bridge. A modified imp
ulse echo overlap system with a computer controlled sampling oscillosc
ope permits the measurement of very small effects. Results for Potassi
um Dihydrogen Phosphate (KDP) near the phase transition at 123 K are p
resented and discussed.