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ZnGa2O4:Mn2+ phosphors grown by Laser Floating Zone
Santos, N.F.; Rodrigues, J.; Nico, C.; Fernandes, A.J.S.; Costa, F.M.; Monteiro, T.Cubic zinc gallate (c-ZnGa2O4) has attracted the attention of the scientific community due to its potential phosphor applications, namely in field emission displays (FEDs) and other electroluminescent devices. Among other advantages, this oxide matrix shows superior thermal and chemical stability when compared to ZnS based phosphors. Most of the above mentioned works comprise nanostructures, thin films or press...
Exotic manganese dioxide structures in niobium oxides capacitors
Nico, C.; Soares, M. R. N.; Matos, M.; Monteiro, R.; Graça, M. P. F.; Monteiro, T.; Costa, F. M.; Valente, M. A.Resumo não disponível.
Structural and optical properties of europium doped zirconia single crystals fi...
Soares, M.R.N.; Nico, C.; Peres, M.; Ferreira, N.; Fernandes, A.J.S.; Monteiro, T.; Costa, F.M.Yttria stabilized zirconia single crystal fibers doped with europium ions were developed envisaging optical applications. The laser floating zone technique was used in order to grow millimetric high quality single crystal fibers. The as-grown fibers are completely transparent and inclusion free, exhibiting a cubic structure. Under ultraviolet (UV) excitation, a broad emission band appears at 551 nm. The europiu...
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