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Titolo: Oblique acoustic axes in trigonal crystals
Autore: Mozhaev, VG; Bosia, F; Weihnacht, M;
 Indirizzi:
 Moscow MV Lomonosov State Univ, Fac Phys, Moscow 117234, Russia Moscow MV Lomonosov State Univ Moscow Russia 117234 oscow 117234, Russia Inst Festkorper & Werkstofforsch, D01069 Dresden, Germany Inst Festkorper& Werkstofforsch Dresden Germany D01069 resden, Germany
 Titolo Testata:
 JOURNAL OF COMPUTATIONAL ACOUSTICS
fascicolo: 3,
volume: 9,
anno: 2001,
pagine: 1147  1161
 SICI:
 0218396X(200109)9:3<1147:OAAITC>2.0.ZU;2K
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 SURFACE; EXISTENCE;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Engineering, Computing & Technology
 Citazioni:
 23
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Mozhaev, VG Moscow MV Lomonosov State Univ, Fac Phys, Moscow 117234, Russia Moscow MV Lomonosov State Univ Moscow Russia 117234 , Russia



 Citazione:
 V.G. Mozhaev et al., "Oblique acoustic axes in trigonal crystals", J COMP ACOU, 9(3), 2001, pp. 11471161
Abstract
A general analysis on the subject of acoustic axes for bulk acoustic wavesin trigonal crystals is presented. It is shown that the effect of piezoelectricity increases the maximum allowable number of acoustic axes in the plane of elastic symmetry from three to five for trigonal crystals of class 3m, and from 3 to 7 for trigonal crystals of class 32. The theory of acousticaxes of general orientation developed by Khatkevich (1962) is revised. A new, simpler and more general derivation of the conditions for the occurrence of acoustic axes of general orientation in crystals is presented. It is found that the previous analytical results and conclusions stating the absence of such axes in trigonal crystals are incorrect. New correct equations for acoustic axes of general orientation in trigonal nonpiezoelectric crystals are derived and confirmed by independent numerical calculations. Acoustic axes of general orientation oblique to the elastic symmetry planes are found to exist in berlinite (class 32) and in nonpiezoelectric lithium niobate (class 3m), however piezoelectricity eliminates these axes in the latter crystal. Some illustrative examples of the relationship between leaky surface acoustic wave branches and acoustic axes in trigonal crystals axe given.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 10:37:04