Institute of Microelectronics Technology and High–Purity Materials, Russian Academy of Sciences

D. V. Roshchupkin

D. V. Irzhak

E. V. Emelin

FOMOS Materials Co

R. R. Fahrtdinov
O. A. Buzanov

S. A. Sakharov

Multicomponent piezoelectric crystals of langasite family were studied. The process of crystal growth and crystal structure were investigated. X−ray diffraction and topography were used to study the acoustic properties of crystals. The possibility of application of the piezoelectric crystals in high−temperature SAW−sensors was demonstrated.

1. Da Cunda, M. P. Investigation on recent quartz−like materials for SAW applications / M. P. Da Cunda, S. A. Fagundes // IEEE Trans. Ultrason. Ferroelectr. Freq. Control. − 1999. − V. 46. − P. 1583—1594.
2. Smythe, R. C. Langasite, langanite, and langatate bulk−wave Y−cut resonators / R. C. Smythe, R. C. Helmbold, G. E. Hague, K. A. Snow // Ibid. − 2000. − V. 47. − P. 355—361.
3. Fritze, H. Langasite for high−temperature bulk acoustic wave applications / H. Fritze, H. L. Tuller // Appl. Phys. Lett. − 2001. − V. 78. − P. 976—983.
4. Naumenko, N. Optimal cuts of langasite, La₃Ga₅SiO₁₄ for SAW devices / N. Naumenko // IEEE Trans. Ultrason. Ferroelectr. Freq. Control. − 2001. − V. 48. − P. 530—538.
5. Roshchupkin, D. V. X−ray Bragg diffraction from langasite crystal modulated by surface acoustic wave / D. V. Roshchupkin, D. V. Irzhak, R. Tucoulou, O. A. Buzanov // J. Appl. Phys. − 2003. − V. 94. − P. 6692—6692.
6. Roshchupkin, D. V. X−ray topography analysis of acoustic wave fields in the SAW−resonators structures / D. V. Roshchupkin, H. D. Roshchupkina, D. V. Irzhak // IEEE Transaction on Ultrasonics, Ferroelectrics, and Frequency Control. − 2005. − V. 52. − P. 2081—2087.
7. Roshchupkin, D. Diffraction of a focused x−ray beam from La₃Ga₅SiO₁₄ crystal modulated by surface acoustic waves / D. Roshchupkin, D. Irzhak, A. Snigirev, I. Snigireva, L. Ortega, A. Sergeev // J. Appl. Phys. − 2011. − V. 110. − P. 124902(7).
8. Roshchupkin, D. V. X−ray diffraction analysis of the surface acoustic wave propagation in langatate crystal / D. V. Roshchupkin, A. I. Erko, L. Ortega, D. V. Irzhak // J. Appl. Phys. A. − 2009. − V. 94. − P. 477—485.
9. Roshchupkin, D. V. Investigation of structural perfection and acoustic properties of La₃Ga₅SiO₁₄ crystals by high resolution x−ray diffraction, topography, and microfluorescence analysis / D. V. Roshchupkin, D. V. Irzhak, E. D. Roshchupkina, O. A. Buzanov // Crystallography Rep. − 2004. − V. 49. − P. S80—S88.
10. Sakharov, S. High−temperature sensor based on SAW−modulated langasite crystal / S. Sakharov, D. Roshchupkin, E. Emelin, D. Irzhak, O. Buzanov, A. Zabelin // Proc. Eng. − 2011. − V. 25. − P. 1020—1023.