EPR evidence of surface paramagnetic defects formation due to annealing of LaF3 nanoparticles

被引：4
|
作者：
Rakhmatullin, R. M. [1 ]
Pudovkin, M. S. [1 ]
Semashko, V. V. [1 ]
机构：
[1] Kazan Fed Univ, Kremlevskaya 18, Kazan 420008, Russia
来源：
MAGNETIC RESONANCE IN SOLIDS | 2019年 / 21卷 / 04期
关键词：
fluoride nanoparticles; EPR; surface paramagnetic defect; luminescence; CONVERSION;
D O I：
10.26907/mrsej-19411
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
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 the study can help to improve the performance of fluoride nanoparticles for biomedical applications.
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页数：6
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