A. Bartasyte, O. Elmazria, M. Gonzalez, L. Bouvot, E. Blampain, P. Boulet
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Reduction of temperature coefficient of frequency in LiTaO3 single crystals for surface acoustic wave applications
Temperature coefficient of frequency of LiTaO3 single crystals was tuned by changing the Li stoichiometry. For this purpose, congruent 36°Y cut crystals, available commercially, were treated by vapor transport equilibration and temperature coefficient of frequency of surface acoustic waves propagating along X-axis as a function of Li concentration was studied. The temperature coefficient of frequency of -7 ppm/° was achieved for surface acoustic waves propagating in the crystals containing 49.43 mol % of Li2O.
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