Luminescence of Fe3+ in single crystals of LiAl5O8 |
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Authors: | T Abritta F de Souza Barros NT Melamed |
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Institution: | Instituto de Fisica—UFRJ, Rio de Janeiro, R.J., 21944, Brazil;Westinghouse R&D Center, Pittsburgh, Pennsylvania 15235, USA |
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Abstract: | We have measured the luminescent properties of single crystals of LiAl5O8:Fe3+. In addition to a zero-phonon line due to Fe3+ in A-sites, we have observed another sharp fluorescent line at 699.2 nm which we assign to Fe3+ occupying B-sites. The excitation spectrum of the B-site Fe3+ shows characteristics similar to those of the A-site Fe3+ but are also shifted towards longer wavelengths. The spectra of the single crystals are compared with those of ordered and disordered powder samples. |
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