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Numerical analysis of surface and leaky surface acoustic waves in new piezoelectric KNBO3, PKN, and LGN crystals

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Abstract

We perform a numerical analysis of the properties of surface acoustic waves (SAW) as well as leaky surface acoustic waves (LSAW) in piezoelectric KNbO3, Pb2KNb5O15 (PKN) and La3Ga5.5Nb0.5O14 (LGN) crystals. We determine optimal thermostable cuts and directions in which the SAWs have high phase velocity, a very high coefficient of electromechanical coupling. and a small angle between the phase and group velocities. We also found the cuts and directions in which the LSAWs can exist. The characteristics of the LSAWs (velocity, the coefficient of electromechanical coupling, angle between the phase and group velocities, temperature coefficient of velocity, and coefficient of surface absorption along the LSAW propagation direction) are calculated.

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Authors
  1. M. Yu. Dvoesherstov
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  2. A. P. Chirimanov
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Additional information

N. I. Lobachevsky State University, Nizhny Novgorod, Russia. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 42, No. 5, pp. 485–493, May 1999.

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Dvoesherstov, M.Y., Chirimanov, A.P. Numerical analysis of surface and leaky surface acoustic waves in new piezoelectric KNBO3, PKN, and LGN crystals. Radiophys Quantum Electron 42, 431–438 (1999). https://doi.org/10.1007/BF02677624

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  • DOI: https://doi.org/10.1007/BF02677624

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