| Full text | |
| Author(s): |
de Moraes, Jair Ricardo
[1]
;
Baldochi, Sonia Licia
[1]
;
Leano Soares, Leonardo dos Reis
[1]
;
Mazzocchi, Vera Lucia
[1]
;
Ramos Parente, Carlos Benedicto
[1]
;
Courrol, Lilia Coronato
[2]
Total Authors: 6
|
| Affiliation: | [1] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, BR-05508000 Sao Paulo - Brazil
[2] Univ Fed Sao Paulo, UNIFESP, Dept Ciencias Exatas & Terra, BR-09972270 Diadema, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Materials Research Bulletin; v. 47, n. 3, p. 744-749, MAR 2012. |
| Web of Science Citations: | 7 |
| Abstract | |
Transparent and uniform LiLa(1-x)Eux(WO4)(2) single-crystalline fibers where x = 0.005, 0.01, 0.03, 0.05, 0.07, 0.1, 0.15, 0.2, 0.25 and 1.0, with an average of 20-40 mm length were obtained by the micro-pulling-down method aiming structural and optical characterization. The optimum pulling rate was found to depend on the difference between alkali and rare earth ionic radii. Rietveld analysis from X-ray diffraction data and excitation spectroscopy at room temperature were applied to investigate the lattice changes due to the Eu3+ incorporation in the host. LiLa(1-x)Eux(WO4)(2) crystal fibers present red emission due to the electric dipole D-5(0) -> F-7(2) transition under 395 nm excitation showing a concentration quenching around 20 mol% of doping. The excitation spectra of the F-7(0) -> D-5(0) transition show small changes in the Eu3+ surroundings as function of dopant concentration. (C) 2011 Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 08/10721-9 - Microcrystals preparation study of LiLa(WO4)2:RE3+ for photonic applications |
| Grantee: | Jair Ricardo de Moraes |
| Support Opportunities: | Scholarships in Brazil - Doctorate |