Effect of high temperature isothermal annealing on optical properties of Gd3AlxGa5-xO12 (x = 1—3) and Gd3Al2Ga3O12:Ce3+ crystals

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Crystals of gadolinium-aluminum-gallium garnets with the following charge compositions: Gd3AlxGa5-xO12 (x = 1—3) and Gd3Al2Ga3O12:Ce3+ were grown The influence of high-temperature annealing in air on the optical properties of these crystals has been established. It was shown that annealing does not affect the oxidation state of cerium. Using X-ray fluorescence analysis, a gallium deficiency was established in all the studied crystals.

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作者简介

V. Kasimova

National University of Science and Technology MISIS

编辑信件的主要联系方式.
Email: kasimova.vm@misis.ru
俄罗斯联邦, Moscow, 119049

N. Kozlova

National University of Science and Technology MISIS

Email: kasimova.vm@misis.ru
俄罗斯联邦, Moscow, 119049

E. Zabelina

National University of Science and Technology MISIS

Email: kasimova.vm@misis.ru
俄罗斯联邦, Moscow, 119049

O. Buzanov

JSC “Fomos Materials”

Email: kasimova.vm@misis.ru
俄罗斯联邦, Moscow, 107023

A. Bykov

National University of Science and Technology MISIS

Email: kasimova.vm@misis.ru
俄罗斯联邦, Moscow, 119049

A. Targonsky

National Research Centre “Kurchatov Institute”; Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences

Email: kasimova.vm@misis.ru
俄罗斯联邦, Moscow, 123182; Moscow, 119333

A. Rogachev

National Research Centre “Kurchatov Institute”

Email: kasimova.vm@misis.ru
俄罗斯联邦, Moscow, 123182

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2. Fig. 1. XANES spectra near the L3 absorption edge of cerium in GAGG: Ce3+: initial state (a), annealing in air (b).

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3. Fig. 2. Spectral dependences of the transmission coefficients of Gd3Al1Ga4O12 (1, 2), Gd3Al2Ga3O12 (3, 4), Gd3Al3Ga2O12 (5, 6), GAGG:Ce3+ (7, 8) crystals in the initial state (1, 3, 5, 7) and after annealing in air at 1173 K (2, 4, 6, 8) (a) and at 1523 K for GAGG:Ce3+ (b) in the wavelength range of 200–700 nm.

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4. Fig. 3. Spectral dependences of the transmission coefficients of Gd3Al1Ga4O12 (1, 2), Gd3Al2Ga3O12 (3, 4), Gd3Al3Ga2O12 (5, 6) crystals in the initial state (1, 3, 5) and after annealing in air at 1173 K (2, 4, 6) in the wavelength range of 265–290 nm (a) and 295–325 nm (b).

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