EPR evidence of surface paramagnetic defects formation due to annealing of LaF3 nanoparticles
https://doi.org/10.26907/mrsej-19411
Abstract
An EPR technique and optical measurements have been applied to study LaF3 nanoparticles doped with 7% of Pr3+ ions. It has been found that vacuum annealing of the studied samples leads to the appearance of paramagnetic defects with g-factor close to the value which is typical for the electron trapped in a fluorine vacancy. The concentration of paramagnetic defects was reduced after fluorination of initial nanoparticles. The possible origin of surface defects due to vacuum annealing is discussed. The results of study can help to improve the performance of fluoride nanoparticles for biomedical applications.
Supporting agencies: This EPR study and characterization of the nanoparticles works were funded by the subsidy allocated to Kazan Federal University for the state assignment in the sphere of scientific activities [No. 3.1156.2017/4.6, No. 3.5835.2017/6.7]. The optical spectroscopy study was supported by the research grant of Kazan Federal University.
About the Authors
R. M. Rakhmatullin
Kazan Federal University
Russian Federation
Russian Federation
Kremlevskaya 18, Kazan 420008
M. S. Pudovkin
Kazan Federal University
Russian Federation
Russian Federation
Kremlevskaya 18, Kazan 420008
V. V. Semashko
Kazan Federal University
Russian Federation
Russian Federation
Kremlevskaya 18, Kazan 420008
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Review
For citations:
Rakhmatullin R.M., Pudovkin M.S., Semashko V.V. EPR evidence of surface paramagnetic defects formation due to annealing of LaF3 nanoparticles. Magnetic Resonance in Solids. 2019;21(4):19411 (6 pp.). https://doi.org/10.26907/mrsej-19411
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