Optical, Structural, and Mechanical Properties of Gd3Ga5O12 Single Crystals Irradiated with 84Kr+ Ions
Karipbayev Z.T. Kumarbekov K. Manika I. Dauletbekova A. Kozlovskiy A.L. Sugak D. Ubizskii S.B. Akilbekov A. Suchikova Y. Popov A.I.
August 2022John Wiley and Sons Inc
Physica Status Solidi (B) Basic Research
2022#259Issue 8
Herein, the optical absorption, X-ray diffraction (XRD) analysis data, and mechanical properties along the ion path are analyzed for gadolinium gallium garnet (Gd3Ga5O12 or GGG) single crystals irradiated with fast 84Kr ions to fluences of 1013–1014 ion cm−2. It is found that the optical absorption spectra of Czochralski-grown unirradiated GGG crystal consist of relatively narrow lines in the UV spectral range associated with the 4f–4f transitions in Gd3+ ions. Transitions from the 6S7/2 ground state to the 6P, 6J, and 6D states in the Gd3+ cation are visible. An additional absorption band is also observed at 350 nm, which is associated with an uncontrolled Ca impurity. In irradiated GGG single crystals, a shift of the fundamental absorption edge by ≈30 nm to the long-wavelength part of the spectrum is observed. The observed changes are caused by structural disturbances caused by depletion of the surface layer and an increase in the number of displaced atoms accompanied by an increase in the crystal lattice parameter. XRD analysis shows the presence of size effects and deformation of interplanar distances due to the displacement of atoms from the sites of the crystal lattice with subsequent migration. Hardness measurements show ion-induced softening, which may be due to ion-induced amorphization.
amorphization , Gd3Ga5O12 single crystal , radiation damage , swift heavy ions
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L.N. Gumilyov, Eurasian National University, Nur-Sultan, 010008, Kazakhstan
Institute of Solid State Physics, University of Latvia, 8 Kengaraga, Riga, LV-1063, Latvia
Laboratory of Solid State Physics, Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
Department of the Semiconductor Electronics, Lviv Polytechnic National University, 12 Bandery St., Lviv, 79046, Ukraine
Department of Physics and Methods of Teaching Physics, Berdyansk State Pedagogical University, 4 Schmidt Str., Berdyansk, 71100, Ukraine
L.N. Gumilyov
Institute of Solid State Physics
Laboratory of Solid State Physics
Department of the Semiconductor Electronics
Department of Physics and Methods of Teaching Physics
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