Sound in biased piezoelectric materials of general anisotropy

Autor:	Joris Degrieck, Nico F. Declercq, Oswald Leroy
Rok vydání:	2005
Předmět:	Physics Piezoelectric coefficient Condensed matter physics Acoustics Lithium niobate Plane wave General Physics and Astronomy Polarization (waves) Piezoelectricity chemistry.chemical_compound chemistry Energy flow Anisotropy Slowness
Zdroj:	Annalen der Physik. 14:705-722
ISSN:	1521-3889 0003-3804
DOI:	10.1002/andp.200510160
Popis:	A theoretical model is presented that describes the propagation of sound in biased piezoelectric crystals of any kind of symmetry. The symmetry relations for the higher order material constants of trigonal 3m crystals, are calculated and listed in the appendix. The example of Lithium Niobate is highlighted, under influence of a bias pressure. The change of slowness (inverse velocity), because of this pressure, is calculated for every direction. Also the influence of stress on the acoustic polarization and the energy flow is outlined. Furthermore, the difference between the case where piezoelectricity is included and the case where it is omitted, is discussed. The description of changing slowness surfaces, because of a bias field, is not limited to homogeneous plane waves, but also inhomogeneous plane waves are taken into account.
Databáze:	OpenAIRE
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