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- W2169748327 abstract "Diamond and AlN are, respectively, the non- piezoelectric and piezoelectric materials showing the highest acoustic velocities. So, SAW devices based on AlN/diamond are a promising candidate to operate at the highest frequencies. In this work we analyze both theoretically and experimentally the propagation along this structure of the 0 th and 1 st SAW modes and of the 1 st PSAW mode. The phase velocity and leaky propagation loss were calculated vs. AlN film thickness h, normalized to the acoustic wavelength λ, for different electrical boundary conditions at the AlN surfaces. For AlN/diamond, two different low-loss PSAW conditions have been observed in the 1 st PSAW mode at h/λ ≈ 0.09 and 0.15, where the leaky loss is below 0.001 dB/λ, i.e. it is possible that fast PSAWs degenerate into SAWs, at these points. The corresponding velocities are ≈ 15.9 and 13.4 km/s. Experiments on both SAW and low-loss PSAW propagation have been done using the same delay line configuration on AlN/diamond, at different AlN thickness. A good accordance between experimental data and theoretical predictions was observed for both phase and group velocities." @default.
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- W2169748327 date "2006-03-10" @default.
- W2169748327 modified "2023-09-26" @default.
- W2169748327 title "Theoretical and experimental investigation of PSAW and SAW properties of A1N films on isotropic diamond substrates" @default.
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- W2169748327 doi "https://doi.org/10.1109/ultsym.2005.1603235" @default.
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