Luminescence Spectroscopy of Mn2+ in SrF2
Photoluminescence and excitation spectra of the concentration series of SrF2 : Mn2+ (CMn = 0.01 ÷ 1.5%) crystals, as well as their lifetimes at 77 К, are studied. The primary purpose of the paper is to detect Mn2+ isomorphism in photoluminescence, reveal its character, and compare the obtained resu...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Kazan Federal University
2015-12-01
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| Series: | Учёные записки Казанского университета: Серия Физико-математические науки |
| Subjects: | |
| Online Access: | https://kpfu.ru/portal/docs/F_687434648/157_4_phys_mat_16.pdf |
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| Summary: | Photoluminescence and excitation spectra of the concentration series of SrF2 : Mn2+ (CMn = 0.01 ÷ 1.5%) crystals, as well as their lifetimes at 77 К, are studied. The primary purpose of the paper is to detect Mn2+ isomorphism in photoluminescence, reveal its character,
and compare the obtained results to the available data on other members of the fluorite homologous series. The luminescent properties of SrF2 : Mn 2+ crystals are for the first time explained by the presence of exchange-coupled pairs, cubic and trigonal centers of Mn2+ ions. The presence of noncubic symmetry centers is related to the instability of the Mn6−8 molecule, which is stipulated by the smaller radius of the manganese ion compared to that of Sr2+ , and the striction effect induced by the exchange-coupled pairs. It is assumed that the luminescence of trigonal centers from the second excitation level of the manganese ion is stipulated by the Ham effect. |
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| ISSN: | 2541-7746 2500-2198 |