Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5398964 | Journal of Luminescence | 2015 | 7 Pages |
Abstract
The absorption spectra of Sm2+ doped in MFX (M=Sr, Ba; X=Cl, Br) crystals were studied within the range of 20,000-35,000Â cmâ1 as a function of temperature and host. The absorption bands observed were described with a simple model developed by Wood and Kaiser using group theory. The temperature and host dependence on the 7F0â5D3 Fano resonance lines were investigated. BaFCl:Sm2+ system showed a “normal” 7F0â5D3 transition at 4Â K in spite of similar crystal structure and absorption profile with other MFX hosts. New Fano resonances were observed in the absorption spectra at higher energies (23,000-25,000Â cmâ1) for all MFX:Sm2+ systems at 4Â K which persist up to room temperature. Preliminary energy level calculation showed that these resonance lines involve the interaction between higher excited 5LJ states of 4f6 configuration and 4f55d1 configuration.
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Authors
Prodipta Pal, Hans Hagemann, Hans Bill, Jiahua Zhang,