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http://hdl.handle.net/10773/6155
Título: | Microwave dielectric permittivity and photoluminescence of Eu 2O3 doped laser heated pedestal growth Ta 2O5 fibers |
Autor: | Rubinger, C.P.L. Costa, L.C. Macatrão, M. Peres, M. Monteiro, T. Costa, F.M. Franco, N. Alves, E. Saggioro, B.Z. Andreeta, M.R.B. Hernandes, A.C. |
Palavras-chave: | dielectric losses dielectric materials doping europium compounds fibres microwave materials permittivity photoluminescence tantalum compounds transparency |
Data: | 25-Jun-2008 |
Editora: | AIP |
Resumo: | We report the microwave dielectric properties and photoluminescence of undoped and europium oxide doped Ta2O5 fibers, grown by laser heated pedestal growth technique. The effects of Eu2O3 doping 1–3 mol % on the structural, optical, and dielectric properties were investigated. At a frequency of 5 GHz, the undoped material exhibits a dielectric permittivity of 21 and for Eu2O3 doped Ta2O5 samples it increases, reaching up to 36 for the highest doping concentration. Nevertheless, the dielectric losses maintain a very low value. For this wide band gap oxide, Eu3+ optical activation was achieved and the emission is observed up to room temperature. Thus, the transparency and high permittivity make this material promising for electronic devices and microwave applications. © 2008 American Institute of Physics. |
Descrição: | Partilhar documento na coleção da comunidade Laboratório Associado I3N |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/6155 |
ISSN: | 0003-6951 |
Versão do Editor: | link.aip.org/link/doi/10.1063/1.2952284 |
Aparece nas coleções: | DFis - Artigos I3N-FSCOSD - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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APL.pdf | versão pdf do editor | 227.83 kB | Adobe PDF | Ver/Abrir |
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