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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Comparison of structural and spectroscopic properties of Ho3+-doped niobate compounds

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Author(s):
Guene-Girard, S. [1] ; Courtois, J. [1] ; Dussauze, M. [2] ; Heintz, J-M [1] ; Fargues, A. [1] ; Roger, J. [3] ; Nalin, M. [4] ; Cardinal, T. [1] ; Jubera, V [1]
Total Authors: 9
Affiliation:
[1] Univ Bordeaux, ICMCB, Bordeaux INP, CNRS, UMR 5026, F-33600 Pessac - France
[2] Univ Bordeaux, ISM Inst Mol Sci, CNRS, UMR 5255, F-33405 Talence - France
[3] Univ Bordeaux, Lab Composites ThermoStruct, CNRS, UMR 5801, F-33600 Pessac - France
[4] Sao Paulo State Univ UNESP, Chem Inst, BR-14800060 Araraquara, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Materials Research Bulletin; v. 143, NOV 2021.
Web of Science Citations: 0
Abstract

Ho3+-doped YNbO4 and Y3NbO7 phosphors were synthesised via a co-precipitation synthesis route. Structural characterisation and spectroscopic properties were performed as a function of the Ho3+ concentration. The Rietveld type-refinement confirms the stabilisation of the pure monoclinic Fergusonite YNbO4 phase at the highest temperatures, but the quadratic phase is stabilised for the lowest temperature, whereas a pure cubic fluorite Y3NbO7 phase was observed for all of the heat treatments. Raman and infrared spectroscopies were used to compare the cation-oxygen vibrational modes. Emission spectra and up-conversion processes were obtained under excitation at 445 and 975 nm respectively. For a similar Ho3+ content, the energy transfers observed show differences between the two crystalline compounds that are related to a stronger interaction between the holmium cations in the fluorite host lattice. (AU)

FAPESP's process: 19/01223-0 - Study of optical and magnetic properties of heavy metal oxide glasses and their applications in 3D printing
Grantee:Marcelo Nalin
Support Opportunities: Scholarships abroad - Research
FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC