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Acoustic plate waves in potassium niobate single crystal

Acoustic plate waves in potassium niobate single crystal

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The characteristics of acoustic waves propagating in thin plates of single crystal potassium niobate (KNbO3) have been theoretically investigated. It is found that acoustic plate wave modes can provide much stronger electromechanical coupling (ΔV/V = 0.51) than is possible with surface acoustic waves (ΔV/V = 0.265).

Inspec keywords: ultrasonic propagation; electromechanical effects; piezoelectric materials; potassium compounds; surface acoustic waves

Other keywords: electromechanical coupling; shear horizontal modes; KNbO3; symmetric modes; acoustic plate waves; antisymmetric modes; plate wave modes

Subjects: Piezoelectric and ferroelectric materials; Mechanical and acoustical properties of solid surfaces and interfaces; Piezoelectricity and electrostriction

References

    1. 1)
      • K. Yamanouchi , H. Odagawa , T. Kojima , T. Matsumura . Theoretical and experimental study of super high electromechanical couplingsurface acoustic wavepropagation in KNbO3 single crystal. Electron. Lett. , 3 , 193 - 194
    2. 2)
      • B.A. Auld . (1973) Acoustic fields and waves in solids.
    3. 3)
      • M. Zgonik , R. Schlesser , I. Biaggio , J. Tscherry , P. Gunter , E. Voit . Materials constants of KNbO3 relevant for electro- and acousto-optics. J. Appl. Phys. , 2 , 1287 - 1297
    4. 4)
      • Odagawa, H., Matsumura, T., Yamanouchi, K.: `Super high electromechanicalcoupling and zero-temperature characteristics of KNbO', 1997 IEEE Ultrasonics Symp., 1997, 1, p. 235–238.
    5. 5)
      • B.D. Zaitsev , S.G. Joshi , I.E. Kuznetsova . Investigation of quasi- shear-horizontalacoustic waves n thin plates of lithium niobate. Smart Mater. Struct. , 739 - 744
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19981559
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