Unveiling the Structural and Optical Properties of MgAl2O4 Single Crystals Irradiated by Swift Heavy Ions
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Akilbekov, A.; Kiryakov, A.; Dauletbekova, A.; Aralbayeva, G.; Akylbekova, A.; Ospanova, Z. Unveiling the Structural and Optical Properties of MgAl2O4 Single Crystals Irradiated by Swift Heavy Ions. Materials 2024, 17, 344. https:// doi.org/10.3390/ma17020344
Abstract
A synthetic single crystal of magnesium-aluminate spinel was irradiated perpendicularly
to the (111) plane with swift heavy xenon ions with an energy of 220 MeV. The modified layer was
attested based on Raman scattering spectra recorded while focusing on the surface. A decrease in
surface crystallinity was observed, reflected in the changes in fundamental optical characteristics
such as the band gap and the energies of static and dynamic disorder. In this study, we demonstrate,
along with the modification of optical characteristics and the formation of a disordered layer, the
creation of new optically active centers. The luminescent properties of these centers were analyzed.
The effect of temperature flare-up in the 3.4 eV band of the excitation spectrum was determined. The
low sensitivity of Cr3+ luminescence to SHI is demonstrated.