DocumentCode :
915231
Title :
Peculiarities of the Anisimkin Jr.´ plate modes in LiNbO3 and Te single crystals
Author :
Gulyaev, Yury V.
Author_Institution :
Inst. of Radioengineering & Electron., Russian Acad. of Sci., Moscow
Volume :
56
Issue :
5
fYear :
2009
fDate :
5/1/2009 12:00:00 AM
Firstpage :
1042
Lastpage :
1045
Abstract :
Quasi-longitudinal (QL) Anisimkin Jr.´ modes discovered recently in quartz plates are found now in 2 other piezoelectric crystals, belonging to trigonal symmetry. In 128degY,X+90deg-LiNbO3, 2 different QL modes may propagate simultaneously for small plate thickness h/lambda = 0 to 0.06 (h is thickness, lambda is wavelength). The velocity of the 1st mode, v1, is close to the longitudinal bulk wave velocity vL. It is varied with h/lambda and piezoelectrically stiffened (maximum Kn 2 = 39% at h/lambda = 0.08). The velocity of the 2nd QL mode, v2, is close to the shear-horizontal bulk wave velocity vQSH, not varied with h/lambda and not stiffened (Kn 2 = 0). On the contrary, 210degY,X-Te crystal supports only one QL-mode, but it is unusually wideranging and low-dispersive: the mode exists for all h/lambda from 0 to 2.5 with velocity vn almost permanent and equal to vL in the whole range. This mode is piezoelectrically stiffened (maximum Kn 2 = 2% at h/lambda = 0.13). The variety of the Anisimkin Jr.´ modes in different crystals makes them attractive for liquid sensors, where the amount of suitable waves is very restricted.
Keywords :
acoustic wave velocity; bulk acoustic wave devices; lithium compounds; phonons; piezoelectric materials; quartz; tellurium; LiNbO3; Te; liquid sensors; longitudinal bulk wave velocity; piezoelectric crystals; piezoelectrical stiffening; quartz plates; shear-horizontal bulk wave velocity; small plate thickness; suasi-longitudinal Anisimkin Jr. plate modes; trigonal symmetry; Crystals; Metallization; Surface acoustic waves; Tellurium;
fLanguage :
English
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-3010
Type :
jour
DOI :
10.1109/TUFFC.2009.1136
Filename :
4976289
Link To Document :
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