DocumentCode
1277405
Title
Acoustic velocities of shear waves in La3Ga5.5Ta0.5O14 piezoelectric crystal using singular value decomposition
Author
Chou, Mitch M.C. ; Malocha, Donald C.
Author_Institution
Dept. of Mater. & Optoelectron. Sci., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Volume
57
Issue
8
fYear
2010
fDate
8/1/2010 12:00:00 AM
Firstpage
1813
Lastpage
1817
Abstract
La3Ga5.5Ta0.5O14 (LGT) is a new piezoelectric material with superior electromechanical properties and high Q·f product. Transverse-wave splitting behavior of LGT was observed in the acoustic velocity measurements. The velocities of the two shear waves propagating in Y-(010) direction are very close and they cannot be separated completely. This has a tremendous influence on determining the correct velocity of the shear modes. It is proposed that the singular value decomposition (SVD) technique can be used to determine the splitting time of two shear modes in Y-plane LGT crystal. Moreover, it also helps to correct the arrival time of the transverse waves. It is believed that the presented approach is efficient and accurate for determining the correct velocities of shear modes in anisotropic media.
Keywords
acoustic wave velocity; acoustic waves; anisotropic media; gallium compounds; lanthanum compounds; piezoelectric materials; piezoelectricity; singular value decomposition; La3Ga5.5Ta0.5O14; acoustic velocity; anisotropic media; electromechanical properties; piezoelectric crystal; shear waves; singular value decomposition; transverse-wave splitting behavior; Acoustic propagation; Acoustic waves; Anisotropic magnetoresistance; Piezoelectric materials; Singular value decomposition; Velocity measurement;
fLanguage
English
Journal_Title
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
Publisher
ieee
ISSN
0885-3010
Type
jour
DOI
10.1109/TUFFC.2010.1619
Filename
5529469
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