Title :
Elastic properties of proton exchanged lithium niobate
Author :
Biebl, Erwin M. ; Russer, Peter
Author_Institution :
Lehrstuhl fur Hochfrequenztech., Tech. Univ. Munich, Germany
fDate :
5/1/1992 12:00:00 AM
Abstract :
A method is demonstrated for determination of elastic constants of anisotropic layers on arbitrarily anisotropic and piezoelectric substrates only using the easily measured velocity of surface acoustic waves. By means of a detailed theoretical analysis it is shown that by use of the presented method, the elastic stiffness constants and propagation properties of any nonpiezoelectric isotropic, cubic, or even trigonal layer can be determined. The method is applied to proton-exchanged lithium niobate (PE:LiNbO/sub 3/). Complete measurements of dispersion characteristics of Rayleigh waves on Y-cut PE:LiNbO/sub 3/ and calculated values of all elastic stiffness constants of the proton-exchanged film are reported.<>
Keywords :
Rayleigh waves; dispersion relations; elastic constants; ion exchange; lithium compounds; piezoelectric materials; surface acoustic waves; ultrasonic velocity; Rayleigh waves; SAW velocity; anisotropic layers; anisotropic substrates; cubic layer; dispersion characteristics; elastic stiffness constants; piezoelectric substrates; propagation properties; proton exchanged LiNbO/sub 3/; proton-exchanged film; surface acoustic wave velocity measurement; trigonal layer; Acoustic measurements; Acoustic propagation; Acoustic waves; Anisotropic magnetoresistance; Dispersion; Lithium niobate; Protons; Substrates; Surface acoustic waves; Velocity measurement;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
