Spectroscopy in perovskites based on rare earth doped niobates

• Grant number: 18/25886-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: March 01, 2019
• End date: September 30, 2021
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Marcio Peron Franco de Godoy
• Grantee: Guilherme Ilario Correr
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

The proposal is based in the investigation of the optical properties of complex perovskite based on lead niobate and magnesium modified with lead titanate (PMN-PT) transparent ceramics. Particularly, the basis of this investigation is the photoluminescence spectroscopy (PL) and the studied samples will be doped with La and rare earth ions (RE=Nd, Tm, Yb, Er and Ho). [19:47, 13/12/2018] Márcio: This host has a technological appeal due to it optical transparency and the ferroelectrical effects, that can be explored for stimulated emissions. The foreseen stages cover the room temperature optical characterization, including the absorption and emission, in function of the dopant and the characterization as a function of temperature, in order to investigate the phase transitions of the host. Additionally, characterizations as functions of the intensity of the light excitation, applied external electric field and Raman spectroscopy can be considered. A correlation between optical and electrical properties by others members of research groups is expected.

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)

CORRER, G. I.; BADILLO, F. A. L.; BOTERO, E. R.; MILTON, F. P.; GARCIA, D.; DE GODOY, M. P. F.. Nd3+ emissions in transparent ferroelectric ceramic hosts under ultraviolet excitation. CERAMICS INTERNATIONAL, v. 48, n. 9, p. 9-pg., 2022-03-21. (14/07375-2, 18/25886-5, 15/13771-0)

CORRER, G. I.; BADILLO, F. A. L.; MILTON, F. P.; GARCIA, D.; DE GODOY, M. P. F.. Assignment of polar nanoregions influence from relaxor/ergodic states on the rare-earth optical emissions. Applied Physics Letters, v. 122, n. 26, p. 6-pg., 2023-06-26. (18/25886-5)

DE PAIVA, A. B.; CORRER, I, G.; UGUCIONI, J. C.; CARVALHO, G. R.; JASINEVICIUS, R. G.; DE GODOY, M. P. F.. On the photoconductivity behavior of emeraldine-salt polyaniline films. Synthetic Metals, v. 281, NOV 2021. (18/25886-5)