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.

fYear

2006

fDate

2-6 Oct. 2006

Firstpage

1189

Lastpage

1192

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2006. IEEE

Conference_Location

Vancouver, BC

ISSN

1051-0117

Print_ISBN

1-4244-0201-8

Electronic_ISBN

1051-0117

Type

conf

DOI

10.1109/ULTSYM.2006.305

Filename

4152161