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Surface and quasi-longitudinal acoustic waves in KTiOAsO₄ single crystals
1Institute of Semiconductor Physics SB RAS, Acad. Lavrentjev Avenue, 13, 630090 Novosibirsk, Russian Federation.
Abstract:
Surface and quasi-longitudinal acoustic wave properties have been investigated in potassium titanyl arsenate (KTiOAsO₄, KTA) single crystals for the first time. Surface acoustic wave (SAW) velocity, electromechanical coupling coefficient and power flow angle characteristics have been obtained in rotated Y-cut of KTA crystals. High SAW electromechanical coupling coefficient (0.4%) is found in Z-cut of KTA crystals. For high-frequency devices it is promising the resonators on quasi-longitudinal acoustic wave in X-cut of KTA crystals with sharp response in interdigital transducer conductance at resonance frequency.
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