Nonlinear electromechanical behaviour of KDP near its phase transition

• Published in: Journal of alloys and compounds Vol. 310; no. 1; pp. 181 - 183
• Main Authors: Straube, U, Beige, H
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 28.09.2000; Elsevier
• Subjects: Acoustic properties; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Elasticity; Exact sciences and technology; Ferroelectricity and antiferroelectricity; Ferroelectrics; Phase transitions; Phase transitions and curie point; Physics; Piezoelectric and electrostrictive constants; Piezoelectricity and electromechanical effects; Ultrasonics; Elasticity; Acoustic properties; Ferroelectrics; Phase transitions; Ultrasonics; Inorganic compounds; Wave attenuation; Ultrasonic waves; Measuring methods; Electromechanical effects; Experimental study; Ferroelectric transitions; KDP; Simultaneous measurement; Piezoelectricity; Non linear effect; Quaternary compounds
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(00)00943-9

Potassium dihydrogen phosphate (KDP) undergoes a ferroelectric phase transition at 123 K. The linear elastic and electromechanical properties are well known. This paper deals with simultaneous measurements of the transit time and the attenuation variations of pulsed ultrasound in parallelepiped samples of KDP using a picosecond sampling oscilloscope. These variations are introduced by low frequency electric fields. The results can be used to determine complex nonlinear piezoelectric coefficients above and below the phase transition of KDP.