Local lattice distortions and ligand hyperfine interactions in Eu2+-and Gd3+-doped fluorites

Gorlov, A. D.; Guseva, V. B.; Zakharov, A. Yu.; Никифоров, А. Е.; Rokeakh, A. I.; Chernyshev, V. A.; Shashkin, S. Yu.

doi:10.1134/1.1130696

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…The nature of the elastic deformation of a fluorite lattice by such an impurity was studied in detail for a CaF 2 : Eu system [21,22]. It has been shown that the dimensions of a distorted (compressed) region of the lattice extent over four to five lattice constants.…”

Section: Resultsmentioning

confidence: 99%

Impurity-Related Excitonic Processes in CaF2 : Sr

Denks¹,

Kotlov²,

Nagirnyi³

et al. 2002

phys. stat. sol. (a)

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Subject classification: 61.72. Ww; 78.55.Li Excitation and emission spectra of CaF 2 :Sr single crystals with various strontium concentrations have been investigated by the method of luminescence spectroscopy. A new emission band peaking at 4.1 eV has been found and attributed to the radiative decay of excitons trapped near the Sr 2þ impurity ions. The same spectral composition has the emission band arising from the recombination of conduction-band electrons with holes localised near Sr 2þ ions (V KA (Sr 2þ ) centres). A mechanism of exciton and hole trapping by homologous cation impurities of large ionic radii is suggested. It is concluded, that the doping of CaF 2 by strontium leads to the increase in radiation stability of this optical material.

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Section: Resultsmentioning

confidence: 99%

Impurity-Related Excitonic Processes in CaF2 : Sr

Denks¹,

Kotlov²,

Nagirnyi³

et al. 2002

phys. stat. sol. (a)

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show abstract

“…Information about the distances to the nearest neighbors can be obtained either empirically by measuring the transferred hyperfine structure parameters A s and A p and assuming that they also follow certain power laws analogous to (6), [16,17] or they can be calculated theoretically minimizing the energy of any lattice including the considered center as it was done in [18][19][20][21]. Because of the absence of the necessary data about the KZnF 3 :Yb 3 þ crystal, we used the t k andB k (R 0 ) values obtained in [22] during the analysis of the structure of tetragonal oxygen centers of the Yb 3 þ ion in the KMgF 3 crystal assuming that the same parameters can be applicable to the description of the interaction between Yb 3 þ and F À ions as in the isomorphous KZnF 3 crystal.…”

Section: Structure Of T Tetmentioning

confidence: 99%