Abstract
The effect of proton irradiation with a dose of 50 Mrad (Si) on the optical properties and defect formation in crystals of gadolinium–aluminum–gallium garnet is studied during the substitution of aluminum and gallium in the cation sublattice: Gd3Al2Ga3O12 (Al : Ga = 2 : 3) and Gd3Al3Ga2O12 (Al : Ga = 3 : 2). After irradiation with protons, the crystals change color: an additional absorption band appears in the spectrum of each crystal in the wavelength range of 400–500 nm. This is due to the formation of induced structural defects in the form of color centers. The refractive indices n(λ) are determined by the Brewster spectrophotometric method and barely change for Al : Ga = 2 : 3 crystals, but largely increase for Al : Ga = 3 : 2. In the spectral dependences, there is a noticeable increase in the attenuation of light, which also indicates the formation of additional structural defects.
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Funding
Studies of optical properties were carried out at the Interdepartmental Educational-Testing Laboratory of Semiconductor and Dielectric Materials “Single Crystals and Stock on Their Basis” National University of Science and Technology “MISIS” with financial support from the Ministry of Science and Higher Education of the Russian Federation within the framework of State Assignment for universities FSME-2023-0003.
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Kasimova, V.M., Kozlova, N.S., Zabelina, E.V. et al. Effect of Proton Irradiation on the Optical Properties and Defect Formation in Gd3AlxGa5 – xO12 (x = 2, 3) Crystals. J. Surf. Investig. 18, 58–62 (2024). https://doi.org/10.1134/S1027451024010105
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DOI: https://doi.org/10.1134/S1027451024010105