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 Microwave dielectric permittivity and photoluminescence of Eu 2O3 doped laser heated pedestal growth Ta 2O5 fibers
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/6155

title: Microwave dielectric permittivity and photoluminescence of Eu 2O3 doped laser heated pedestal growth Ta 2O5 fibers
authors: 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.
keywords: dielectric losses
dielectric materials
europium compounds
microwave materials
tantalum compounds
issue date: 25-Jun-2008
publisher: AIP
abstract: 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.
description: Partilhar documento na coleção da comunidade Laboratório Associado I3N
URI: http://hdl.handle.net/10773/6155
ISSN: 0003-6951
publisher version/DOI: link.aip.org/link/doi/10.1063/1.2952284
source: Applied Physics Letters
appears in collectionsFIS - Artigos
I3N - Artigos

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