Thermal dependence of impurity induced fluorescence in the system RbMgxMn1-xF3 |
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Authors: | N. Koumvakalis W.A. Sibley G.E. Venikouas |
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Affiliation: | Physics Department, Oklahoma State University, Stillwater, Oklahoma 74074, USA |
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Abstract: | The absorption spectrum of RbMnF3 and the excitation spectra of the system RbMgxMn1-xF3 at 10 K as well as the fluorescence spectra and lifetimes of Mn2+ in the systems RbMgxMn1-xF3 and KMgxMn1-xF3 in the region 10–300 K were measured. The lifetime and fluorescence temperature dependence suggest that the origin of the fluorescence occurs at Mn2+ sites slightly perturbed by impurity ions and that a non-radiative energy transfer mechanism is responsible for the observed thermal quenching. By using different Mn2+ concentrations in the above systems the dependence of the energy transfer on the Mn2+ concentration is shown. Finally, a preliminary observation on laser stimulated Mn2+ luminescence in the system RbMgxMn1-xF3 is reported. |
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