The structure perfection studies of LiCaAlF6 crystals by laser acoustics technique

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Resumo

The acoustic properties of LiCaAlF6 crystals and the annealing procedure impact on them were studied. The velocities of longitudinal and shear ultrasonic waves along the direction of the optical c-axis of the crystals were measured by laser acoustics, and the mechanical constants were determined: modules of elasticity, all-round compression, shear, and Poisson's ratio. It has been established that the attenuation coefficient of ultrasonic waves in the 1-15 MHz frequency range can serve as a characteristic of the optical perfection of the crystals. The effect of ultrasonic annealing of LiCaAlF6 crystal samples under prolonged exposure by pulsed ultrasound was discovered.

Sobre autores

E. Zheleva

Kazan (Volga region) Federal University;Kazan E. K. Zavoisky Physical-Technical Institute

Email: stillsennin@mail.ru
Казань, Россия

V. Semashko

Kazan (Volga region) Federal University;Kazan E. K. Zavoisky Physical-Technical Institute

Email: ua4pcy@mail.ru
Казань, Россия

A. Shaveliev

Kazan (Volga region) Federal University

Казань, Россия

O. Morozov

Kazan (Volga region) Federal University;Kazan E. K. Zavoisky Physical-Technical Institute

Казань, Россия

V. Kyashkin

Kazan (Volga region) Federal University

Казань, Россия

A. Karabutov

Kazan E. K. Zavoisky Physical-Technical Institute

Yu. Brodnikovsky

Kazan E. K. Zavoisky Physical-Technical Institute

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Declaração de direitos autorais © Russian Academy of Sciences, 2023

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