Email this article Effect of Annealing on Structural, Textural, Thermal, Magnetic, and Luminescence Properties of Calcium Fluoride Nanoparticles
- Authors: Il’ves V.G.1, Sokovnin S.Y.1,2, Zuev M.G.2,3, Uimin M.A.2,4, Rähn M.5, Kozlova J.5, Sammelselg V.5,6
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Affiliations:
- Institute of Electrophysics, Ural Branch, Russian Academy of Sciences
- Ural Federal University Named after the first President of Russia B.N. Yeltsin
- Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Institute of Physics, University of Tartu
- Institute of Chemistry, University of Tartu
- Issue: Vol 61, No 11 (2019)
- Pages: 2200-2217
- Section: Low-Dimensional Systems
- URL: https://journal-vniispk.ru/1063-7834/article/view/206689
- DOI: https://doi.org/10.1134/S1063783419110179
- ID: 206689
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Abstract
Mesoporous nanocrystalline CaF2 powder was produced by pulsed electron beam evaporation (PEBE) in vacuum. The specific surface area (SSA) of CaF2 nanopowder (NP) reached 88.7 m2/g. The effect of in-air thermal annealing in the temperature range of 200–900°C on the particle size, morphology, textural, thermal, magnetic, and luminescence properties of NPs is studied. A strong deviation from stoichiometry is observed in produced nanoparticles and a significant increase in the SSA after annealing at 200°C. The obtained CaF2 NP shows ferromagnetic (FM) behavior. The FM response appearance can be explained by the formation of structural and radiation defects. An analysis of pulsed cathodoluminescence (PCL) and magnetization curves of CaF2 NPs allows conclusions about their interrelation.
About the authors
V. G. Il’ves
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: ilves@iep.uran.ru
Russian Federation, Yekaterinburg, 620016
S. Yu. Sokovnin
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the first President of Russia B.N. Yeltsin
Email: ilves@iep.uran.ru
Russian Federation, Yekaterinburg, 620016; Yekaterinburg, 620002
M. G. Zuev
Ural Federal University Named after the first President of Russia B.N. Yeltsin; Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Email: ilves@iep.uran.ru
Russian Federation, Yekaterinburg, 620002; Yekaterinburg, 620990
M. A. Uimin
Ural Federal University Named after the first President of Russia B.N. Yeltsin; Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: ilves@iep.uran.ru
Russian Federation, Yekaterinburg, 620002; Yekaterinburg, 620108
M. Rähn
Institute of Physics, University of Tartu
Email: ilves@iep.uran.ru
Estonia, Tartu, 51014
J. Kozlova
Institute of Physics, University of Tartu
Email: ilves@iep.uran.ru
Estonia, Tartu, 51014
V. Sammelselg
Institute of Physics, University of Tartu; Institute of Chemistry, University of Tartu
Email: ilves@iep.uran.ru
Estonia, Tartu, 51014; Tartu, 50411
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