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CHARACTERIZATION OF POLYCRYSTALS OF STO DOPED WITH EUROPIUM: Sr1 - XEuxTiO3

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The crystalline structure, microstructure, luminescence and dielectric properties of SrTiO3 polycrystals doped with Eu3 + at different compositional ratios were studied by XRD, XPS and SEM analyses. Rietveld refinement of the XRD data shows a slight decrease of the cell volume indicating the incorporation of Eu3 + in the crystalline structure. The structure remains cubic (Pm3m) at room temperature in the analyzed range of Eu doping. XPS studies revealed the characteristic signal of the Eu3 + ion in the solid solution. From the dielectric behavior it was possible to identify that Eu doping produces changes with respect to pure STO. Photoluminescence spectra taken at room temperature showed that Eu3 + doping of SrTiO3 causes emission peaks at 590 and 616 nm.
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Keywords: Eu doped SrTiO3 ceramics; luminescence; structural characterization

Document Type: Research Article

Affiliations: 1: Facultad de Ciencias, Departomento de Fisica, UABC, Ensenada, B.C., Mexico 2: Centro de Nanociencias y Nanotecnologia-Universidad Nacional Autonoma de Mexico Apdo, Ensenada, B. C., Mexico

Publication date: 2008-01-01

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