Title :
6K-1 Temperature Coefficients of Potassium Niobate (KNbO3) Elastic Constants Studied by Brillouin Spectroscopy
Author :
Eschbach, J. ; Hakiki, M. El ; Rouxel, D. ; Vincent, B. ; Elmazria, O. ; Vialle, S. ; Kruger, J.K. ; Alnot, P.
Author_Institution :
Lab. de Phys. des Milieux Ionises et Applications, Nancy Univ.
Abstract :
In this paper we present the study of potassium niobate KNbO3 single crystals with different cuts in order to observe the temperature dependence of the acoustic velocity of bulk waves in chosen crystallographic directions. The crystal was temperature controlled to determine the variation of the elastic constant versus the temperature. The novelty of this work concerns the determination for the first time for KNbO3, in the best of our knowledge, of the temperature coefficients of elastic constants C11 and C44. All measurements have been performed by Brillouin spectroscopy, in the range of (240-420 K)
Keywords :
Brillouin spectra; acoustic wave velocity; elastic constants; potassium compounds; 240 to 420 K; Brillouin spectroscopy; KNbO3; KNbO3 single crystals; acoustic velocity; bulk waves; crystallographic directions; elastic constants; potassium niobate; temperature coefficients; Acoustic propagation; Acoustic waves; Crystallography; Equations; Frequency; Niobium compounds; Performance evaluation; Photonic crystals; Spectroscopy; Temperature control;
Conference_Titel :
Ultrasonics Symposium, 2006. IEEE
Conference_Location :
Vancouver, BC
Print_ISBN :
1-4244-0201-8
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2006.305
