Acoustic Properties of Triglycine Sulphate Crystals with Alanine Impurity
Abstract
The frequency- and concentration-dependent absorption coefficients of longitudinal and transverse ultrasonic waves in pure and α-alanine-doped triglycine sulfate (α-TGS) crystals (α-alanine content in crystals is: 5, 10, 15, 20, 25, 30, and 35 mol%) grown from solution at room temperature were studied. It is established that absorption coefficients of ultrasonic waves in α-TGS crystals with L and S polarization with the increase in concentration of α-alanine about 1.57 and 1.88 times decrease, and propagation velocity increases by 3.24 and 13.38%, respectively. Decrease of absorption coefficients of transverse ultrasonic waves caused by elastic scattering of phonons on impurity, i.e., decrease of τ, at the corresponding dispersive properties of a phonon subsystem.
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Copyright (c) 2026 E.U. Arzikulov, F.А. Salaxitdinov, Wang Yujin, Shaowei Lu, Teng Liu, Zhisheng Nong, M.D. Toshboyev, G.G. Gulyamov, N. Mamatkulov

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