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25 May 1998

Volume 72, Issue 21, pp. 2631-2766

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Surface transverse waves on langasite

J. Koskela, S. Lehtonen, V. P. Plessky, and M. M. Salomaa

Appl. Phys. Lett. 72, 2665 (1998); http://dx.doi.org/10.1063/1.121092 (3 pages) | Cited 2 times

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Surface transverse waves (STW) are numerically simulated on langasite. As our method of investigation, we compute the admittance of an infinite synchronous resonator. The resonance and antiresonance frequencies are evaluated as functions of the crystal cut, temperature, and the thickness of the aluminium electrodes. For optimal parameters, we demonstrate a vanishing first-order temperature coefficient at room temperature and find a coupling strength several times stronger than that for Rayleigh waves in ST quartz. In particular, we find that the sensitivity of the resonance frequency to variations in the thickness of the aluminium electrodes is significantly lower in langasite than in ST quartz. © 1998 American Institute of Physics.
Show PACS
77.65.Dq Acoustoelectric effects and surface acoustic waves (SAW) in piezoelectrics
68.35.Gy Mechanical properties; surface strains
77.84.Bw Elements, oxides, nitrides, borides, carbides, chalcogenides, etc.
77.90.+k Other topics in dielectrics, piezoelectrics, and ferroelectrics and their properties (restricted to new topics in section 77)
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