mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal University10.26907/mrsej-19411mrisel-73Research ArticleСтатьиEPR evidence of surface paramagnetic defects formation due to annealing of LaF3 nanoparticlesRakhmatullinR. M.

Kremlevskaya 18, Kazan 420008

rafail.rakhmatullin@kpfu.ruPudovkinM. S.

Kremlevskaya 18, Kazan 420008

jaz7778@list.ruSemashkoV. V.

Kremlevskaya 18, Kazan 420008

Kazan Federal UniversityRussian Federation201906062019214SPECIAL ISSUE dedicated to Boris Z. Malkin's 80th birthday19411 (6 pp.)Copyright © Rakhmatullin R.M., Pudovkin M.S., Semashko V.V., 20242024Rakhmatullin R.M., Pudovkin M.S., Semashko V.V.Rakhmatullin R.M., Pudovkin M.S., Semashko V.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/73

 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.

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The authors declare that there are no conflicts of interest present.