Abstract
The elastic properties of beryllium-lantanum hexaaluminate, BeLaAl11O19 (sp. gr. P63/mmc), a new crystal from the family of hexagonal aluminates, have been studied. The velocities of elastic-wave propagation in the crystals are measured by a new acoustooptic interference method. The values of all the independent components of elastic-constant tensor are determined and used to calculate a number of dynamic parameters of the crystal such as the Young’s and shear moduli, the modulus of volume elasticity, Poisson’s ratio as well as the Debye temperature and specific heat. The data obtained are compared with the same parameters for the well-known magnesium-lantanum hexaaluminate MgLaAl11O19 laser crystals. It is shown that the dynamic properties of the BeLaAl11O19 crystal are close to those of MgLaAl11O19 and are a promising matrix for designing new laser media.
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Translated from Kristallografiya, Vol. 46, No. 3, 2001, pp. 500–505.
Original Russian Text Copyright © 2001 by Bogdanov, Zubrinov, Pestryakov, Petrov, Semenov, Alimpiev.
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Bogdanov, S.V., Zubrinov, I.I., Pestryakov, E.V. et al. Elastic properties of beryllium-lantanum hexaaluminate crystal, BeLaAl11O19 . Crystallogr. Rep. 46, 450–455 (2001). https://doi.org/10.1134/1.1376476
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DOI: https://doi.org/10.1134/1.1376476