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This article is cited in 1 scientific paper (total in 1 paper)
XVII International Theophilov Symposium, Yekaterinburg, September 23-28, 2018
Impurity centers
Electron transfer between heterogeneous lanthanides in BaF$_{2}$ crystals. II – transfer mechanisms
E. A. Radzhabov, V. A. Kozlovsky Vinogradov Institute of Geochemistry and Analytical Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia
Abstract:
The processes of electron transfer from a divalent lanthanide acceptor (Eu, Sm, Yb) to a trivalent lanthanide donor (Nd, Sm, Dy, Tm, Yb) and reverse thermal transfer are studied in barium fluoride crystals. Electron phototransfer at room temperatures is accompanied by a counter-movement of the charge-compensating interstitial fluorine. In the process of photobleaching at low temperatures, the divalent lanthanide donor turns out to be near the interstitial fluorine, which causes its $4f$–$5d$ absorption bands to shift to the red. The magnitude of the shift increases with decreasing size of the lanthanide in the series (Nd, Sm, Dy, Tm, Yb). Detailed mechanisms of photo and thermal electron transfer between heterogeneous lanthanides in BaF$_{2}$ crystals are analyzed.
Citation:
E. A. Radzhabov, V. A. Kozlovsky, “Electron transfer between heterogeneous lanthanides in BaF$_{2}$ crystals. II – transfer mechanisms”, Fizika Tverdogo Tela, 61:5 (2019), 888–891; Phys. Solid State, 61:5 (2019), 785–788
Linking options:
https://www.mathnet.ru/eng/ftt8819 https://www.mathnet.ru/eng/ftt/v61/i5/p888
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