Journal
RADIATION PHYSICS AND CHEMISTRY
Volume 115, Issue -, Pages 189-195Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2015.06.019
Keywords
Glassy alloys; Radiation-induced defects; EPR; Magnetic susceptibility; Photoluminescence
Funding
- Project of Ministry Education and Science of Ukraine [0115U 002348]
- Project of NAS of Ukraine [6115-H]
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Paramagnetic defects in erbium-doped gamma-irradiated chalcogenide glasses were investigated by EPR method. Vacancy nature of defects and the dependence of their concentration on the irradiation dose and erbium content were determined. The measurement of the static magnetization revealed the presence of paramagnetic and ferromagnetic subsystems caused by isolated Er3+ ions and ion clusters, respectively. PL spectra of 4f-4f transitions of Er3+ ions and the radiation mechanism of gamma-irradiated glasses were investigated. It was determined that PL intensity depends on the number of radiation induced defects and on the nature of the distribution of erbium which were determined by EPR and magnetic susceptibility. (C) 2015 Elsevier Ltd. All rights reserved.
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