Effect of Gadolinium on Magnetic Circular Dichroism and Electron Magnetic Resonance of ε-Fe2O3 Nanoparticles Formed in Borate Glasses Full article
| Journal |
Journal of Non-Crystalline Solids
ISSN: 0022-3093 , E-ISSN: 1873-4812 |
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| Output data | Year: 2019, Volume: 506, Pages: 68-79 Pages count : 12 DOI: 10.1016/j.jnoncrysol.2018.12.006 | ||||||||||||
| Tags | Iron oxides; ε-Fe2O3; Borate glasses; Nanoparticles; Magnetic circular dichroism; Electron magnetic resonance | ||||||||||||
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| Affiliations |
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Funding (1)
| 1 | Federal Agency for Scientific Organizations | 0356-2017-0030 |
Abstract:
A remarkable characteristic of borate glasses is the ability of forming magnetic nanoparticles at low doping with transition element oxides. We have studied structure and magnetic properties of iron oxide nanoparticles formed in borate glasses, in particular, concentration and temperature dependences of magnetic circular dichroism (MCD) and electron magnetic resonance (EMR) spectra. A series of glasses of molar composition 22.5K2O-22.5Al2O3–55B2O3 doped with 1.5 mass % of Fe2O3 and different contents of Gd2O3 from 0.1 to 1.0 mass % was prepared using a conventional melt quenching technique and subjected to an additional thermal treatment. The whole set of results allows to identify the predominant magnetic phase in these glasses as ε-Fe2O3 nanoparticles, with a considerable part of iron ions substituted by gadolinium. Analysis and computer simulations of the EMR spectra allow separating the contribution of electron paramagnetic resonance of diluted iron ions and together with the temperature dependences of magnetization demonstrate a superparamagnetic character of the nanoparticle magnetism.
Cite:
Edelman I.
, Kliava J.
, Ivanova O.
, Ivantsov R.
, Velikanov D.
, Zaikovskii V.
, Petrakovskaja E.
, Zubavichus Y.
, Stepanov S.
Effect of Gadolinium on Magnetic Circular Dichroism and Electron Magnetic Resonance of ε-Fe2O3 Nanoparticles Formed in Borate Glasses
Journal of Non-Crystalline Solids. 2019.
V.506. P.68-79. DOI: 10.1016/j.jnoncrysol.2018.12.006
WOS
Scopus
РИНЦ
OpenAlex
AN
Effect of Gadolinium on Magnetic Circular Dichroism and Electron Magnetic Resonance of ε-Fe2O3 Nanoparticles Formed in Borate Glasses
Journal of Non-Crystalline Solids. 2019.
V.506. P.68-79. DOI: 10.1016/j.jnoncrysol.2018.12.006
WOS
Scopus
РИНЦ
OpenAlex
AN
Files:
Full text from publisher
Dates:
| Submitted: | Oct 29, 2018 |
| Accepted: | Dec 21, 2018 |
| Published online: | Jan 23, 2019 |
| Published print: | Feb 15, 2019 |
Identifiers:
| ≡ Web of science: | WOS:000459524700011 |
| ≡ Scopus: | 2-s2.0-85060305805 |
| ≡ Elibrary: | 38699858 |
| ≡ OpenAlex: | W2912269022 |
| ≡ Chemical Abstracts: | 2019:183850 |