Propagation of Acoustic Waves in Piezoelectric Media with a Subsonic Electric Current

2021 ◽  
Vol 67 (3) ◽  
pp. 264-267
Author(s):  
M. A. Mironov
Keyword(s):  
Electric Current ◽  
Acoustic Waves ◽  
Piezoelectric Media

Interface acoustic waves in piezoelectric bi-crystalline structures of specific types

2005 ◽  
Vol 461 (2056) ◽  
pp. 895-911 ◽  
Author(s):  
A. N Darinskii ◽  
M Weihnacht
Keyword(s):  
Acoustic Waves ◽  
The Other ◽  
Imaginary Component ◽  
Sufficient Condition ◽  
Bulk Wave ◽  
Piezoelectric Crystal ◽  
Piezoelectric Media ◽  
Crystalline Structures ◽  
Material Constants ◽  
Bulk Waves

The paper discusses the properties of the acoustic waves guided by an interface inside piezoelectric media. The interfaces of two types have been considered: (i) an infinitesimally thin metallic layer inserted into homogeneous piezoelectric crystal of arbitrary symmetry; (ii) rigidly bonded crystals whose piezoelectric coefficients differ by sign while the other material constants are identical. Several general theorems have been proved regarding the existence of interface acoustic waves (IAWs) propagating more slowly than bulk waves. In particular, a sufficient condition for the existence of such ‘slow’ IAWs has been derived. The propagation of leaky IAWs has been studied. Special attention has been paid to the analysis of the situation when the imaginary component of the leaky IAW velocity vanishes, resulting in the appearance of non-attenuating IAWs travelling faster than the slow transverse bulk wave. The computations performed for LiNbO 3 and LiTaO 3 illustrate general conclusions.

Analysis of Surface Acoustic Waves in Layered Piezoelectric Media and its Applications to the Design of Saw Devices

2003 ◽  
Vol 19 (1) ◽  
pp. 225-232 ◽  
Author(s):  
T.-T. Wu ◽  
Y.-Y. Chen
Keyword(s):  
Acoustic Waves ◽  
Velocity Dispersion ◽  
Metal Layer ◽  
Effective Permittivity ◽  
Surface Acoustic Waves ◽  
Frequency Bandwidth ◽  
Piezoelectric Media ◽  
Saw Devices ◽  
Phase Velocity Dispersion

ABSTRACTIn this paper, we utilized a Stroh based formulation for solving problems of surface waves in layered piezoelectric media, and then, applied it to analyze surface acoustic wave (SAW) devices. The determination of the optimal cut of a piezoelectric crystal and the choice of the best propagation of SAW devices were given. The dispersion induced by a thin metal layer on SAW propagation in a SAW device was analyzed and discussed. Finally, we applied the formulation to calculate the effective permittivity and phase velocity dispersion of a LiNbO3/Diamond layered SAW device. Both of the null frequency bandwidth and the insertion loss of the dispersive SAW device were obtained.

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