journal article

Journal Article

Text

Journal of Applied Physics. 2002, 92(5), p. 2451-2456

Acoustic spectroscopy of lithium niobate: Elastic and piezoelectric coefficients

American Institute of Physics

English

Text

2002-08-16

https://doi.org/10.1063/1.1497702

Ogi H., Kawasaki Y., Hirao M., et al. "Acoustic spectroscopy of lithium niobate: Elastic and piezoelectric coefficients" Journal of Applied Physics, 92(5), 2451-2426 (2002) https://doi.org/10.1063/1.1497702.

We report simultaneous measurement of the complete set of elastic and piezoelectric coefficients of lithium niobate (LiNbO 3), which has trigonal crystal symmetry (3m point group) and thus six independent elastic-stiffness coefficients C ij, four piezoelectric coefficients e ij, and two dielectric coefficients κ ij. We used a single specimen: an oriented rectangular parallelepiped about 5 mm in size. Our measurement method, acoustic spectroscopy, focuses on the crystal's macroscopic resonance frequencies and is sensitive to any property that affects those frequencies. We overcame the principal obstacle to precise measurements - mode misidentification - by using laser-Doppler interferometry to detect the displacement distribution on a vibrating surface. This approach yields unambiguous mode identification. We used 56 resonances ranging in frequency from 0.3 to 1.2 MHz and determined the C ij and e ij with known κ ij. The ten unknowns always converged to the same values even with unreasonable initial guesses. The C ij uncertainty averages 0.09% for the diagonal C ij. The e ij uncertainty averages 5%. All our coefficients fall within the (surprisingly wide) error limits of previous (conventional) measurements. © 2002 American Institute of Physics. © 2002 American Institute of Physics.

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Journal of Applied Physics, 92(5), 2451-2426 (2002) and may be found at https://doi.org/10.1063/1.1497702.

84216

Acoustic spectroscopy of lithium niobate: Elastic and piezoelectric coefficients

American Institute of Physics

English

2002-08-16

Journal of Applied Physics

92

5

2451

2456

https://doi.org/10.1063/1.1497702

https://hdl.handle.net/11094/84216