|
|||||
|
|
EPR and optical absorption of manganese doped BaF2 and SrF2 |
|
| Authors: | P. G. Baranov A. Hofstaetter T. Nickel A. Scharmann F. Schön |
| Affiliation: | 1. Physics Institute, University of Giessen , Heinrich-Buff-Ring 16, D-63, Giessen, FRG;2. A.F. loffe Institute , Leningrad, USSR;3. Physics Institute, University of Giessen , Heinrich-Buff-Ring 16, D-63, Giessen, FRG |
| Abstract: | Abstract Mn+ ions in off-centre position along [100] have been produced in BaF2:Mn by X-irradiation at LNT. Their EPR spectra are characterized by g-2. 0107. D = 265.8·10?4cm?1. A = 122.9·10?4cm?11 and a superhyperfine structure arising from 8 surrounding F? nuclei. In the optical absorption spectrum they show up by a band at 411 nm. This behaviour is compared with the results found for SrF2:Mn. After X-irradiation at room temperature beside a different Mn+ centre two species of Mn0 appear in non-cubic position. Both interact dominantly with two F? neighbours. Possible models for these species are discussed. |
| Keywords: | EPR optical absorption manganese centres BaF2 |