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Markovskyi, Anton; Rosiak, Michał; Gorbenko, Vitalii; Fedorov, Alexander; Cieszko, Mieczysław; Szczepański, Zbigniew; Zorenko, Yuriy; Kaczmarek, Mariusz; Litniewski, Jerzy; Pakuła, Michał, 2025, "Acoustic microscopy study on elasto-mechanical properties of Lu3Al5O12:Ce single crystalline films", https://doi.org/10.18150/BNMREE, RepOD, V1
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This article presents experimental, theoretical, and numerical studies of the propagation of guided ultrasonic waves in a layered epitaxial structure of garnet compounds. A microscopic model, yielding dispersion equations based on material and geometrical properties, was developed. Acoustic microscopy experiments both on YAG:Ce crystal substrate and epitaxial structure containing LuAG:Ce single crystalline films grown using the Liquid Phase Epitaxy growth method onto YAG:Ce crystal substrate revealed distinct phase velocity behaviors. The YAG substrate exhibited consistent velocities, minimally influenced by frequency, while the epitaxial structure showed dispersion, indicating frequency-dependent phase velocities. Experimental results were compared with numerically calculated dispersion curves, showing high agreement in the low-frequency range and minor deviations at higher frequencies. An optimization procedure was developed and applied, starting with the YAG substrate and extending to the LuAG:Ce film/YAG:Ce crystal epitaxial structure. The procedure allowed us to extract material properties, offering valuable insights into the mechanical characteristics of the all-solid-state LuAG:Ce film/YAG:Ce crystal structure. This research represents a significant advancement in understanding ultrasonic wave dynamics in layered structures, particularly unveiling previously unexplored elastic properties of LuAG:Ce single crystalline films as well-known scintillation material.
Single crystalline films, garnets, elastic properties, acoustic microscopy, optimization
Markovskyi, A., Rosiak, M., Gorbenko, V., Fedorov, A., Ciezko, M., Szczepański, Z., Zorenko, Y., Kaczmarek, M., Litniewski, J., & Pakuła, M. (2025). Acoustic microscopy study on elasto-mechanical properties of Lu3Al5O12:Ce single crystalline films. CrystEngComm, 27(15), 2416–2428. https://doi.org/10.1039/d5ce00068h https://pubs.rsc.org/en/content/articlelanding/2025/ce/d5ce00068h doi: 10.1039/d5ce00068h
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