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Thermal strain effects of acoustic surface waves in layered media

Thermal strain effects of acoustic surface waves in layered media

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© The Institution of Electrical Engineers
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The propagation characteristics of acoustic surface waves in layered media are described. The strains caused in the film by thermal expansion can significantly affect the temperature coefficient of delay and the dispersion curves of velocity. Computed results for an SiO2/LiTaO3 structure are compared with experimentally measured values.

Inspec keywords: silicon compounds; surface acoustic waves; thermal stresses; lithium compounds

Other keywords: acoustic surface waves; SAW; dispersion curves; propagation characteristics; thermal strain effects; layered media; SiO2-LiTaO3

Subjects: Mechanical and acoustical properties of solid surfaces and interfaces; Ultrasonics, quantum acoustics, and physical effects of sound; General linear acoustics; Acoustic wave devices

References

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      • A.L. Nalamwar , M. Epstein . Surface acoustic waves in strained media. J. App. Phys. , 43 - 48
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      • A.W. Warner , M. Onoe , G.A. Coquin . Determination of elastic and piezoelectric constants for crystals in class (3m). J. Acoust. Am. , 1223 - 1231
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      • E.H. Borgardus . Third-order elastic constants of Ge, MgO, and fused SiO2. J. Appl. Phys. , 2504 - 2513
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      • Iwahashi, K., Yamanouchi, K., Shibayama, K.: `Temperature dependency of leaky surface wave velocity in SiO', US77-43, Proceedings of the Ultrasonic Committee in IECE, 1977, Japan, p. 37–42.
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      • Parker, T.E., Wichansky, H.: `Material parameter of the temperature-stable SiO', IEEE Cat. No. 75, CHO 994-SU, IEEE ultrasonics symposium, 1975, p. 503–507.
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