Volume 33, Number 7, March I 1996
|Page(s)||539 - 544|
|Section||Condensed matter: structure, thermal and mechanical properties|
|Published online||01 September 2002|
Kinetics effects in lithium-potassium tantalate crystals
Laboratoire d'Acoustique et Optique de la Matière
Condensée , Université P. et M. Curie, Tour 13, Case 78, 4 place
Jussieu, 75252 Paris Cedex 05, France
Accepted: 11 January 1996
The study of the dielectric and acoustic constants, performed in a crystal between 4 and 30 K, puts in evidence a strong analogy between the kinetics of these two susceptibilities. In particular, the two characteristic times measured for each of them have near values and they are roughly constant in all the temperature range. An explanation in terms of tetragonal domains, with quadrupolar order and dipolar disorder, is suggested.
PACS: 62.80.+f – Ultrasonic relaxation / 72.22.Gm – Dielectric loss and relaxation
© EDP Sciences, 1996
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