The effect of fluoride ions on the local environment of rare-earth dopants in luminescent oxyfluoride glasses and ceramics: structural studies by magnetic resonance methods

• Grant number: 12/16297-0
• Support type: Scholarships in Brazil - Master
• Effective date (Start): November 01, 2012
• Effective date (End): March 31, 2014
• Field of knowledge: Physical Sciences and Mathematics - Physics
• Principal Investigator: Hellmut Eckert
• Grantee: Raphaell Junnio Moreira Silva
• Home Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

The development of new solid state laser hosts for high optical quality rare-earth ion doped crystals, glasses, and ceramics is an active area of current materials research. To facilitate the design of materials with optimized emission properties, detailed structural information at the atomic level is essential, regarding the local bonding environment (siting) of the rare earth ions, their second-nearest coordination sphere, and their extent of local clustering, as well as the distribution over separate micro- or nanophases in composite materials. In this project, solid state NMR and EPR will be used to seek a fundamental understanding of the spectroscopic and photophysical properties of such material systems on a structural basis. The systems to be studied are oxyfluoride glasses and ceramics based on calcium and lead fluorophosphate compositions. In connection with this project a comprehensive solid state NMR and EPR strategy will be developed for the structural characterization of rare-earth doped glasses and ceramics. The structural information obtained by these approaches and its correlation with the optical materials properties will be important for developing new design strategies for high power laser materials.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GONCALVES, TASSIA S.; MOREIRA SILVA, RAPHAELL J.; DE OLIVEIRA JUNIOR, MARCOS; FERRARI, CYNTHIA R.; POIRIER, GAEEL Y.; ECKERT, HELLMUT; DE CAMARGO, ANDREA S. S. Structure-property relations in new fluorophosphate glasses singly-and co-doped with Er3+ and Yb3+. Materials Chemistry and Physics, v. 157, p. 45-55, MAY 1 2015. Web of Science Citations: 21.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SILVA, Raphaell Junnio Moreira. Structural characterization of fluorophosphate glasses using NMR methodologies. 2014. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Física de São Carlos São Carlos.