Effect of Gadolinium on Magnetic Circular Dichroism and Electron Magnetic Resonance of ε-Fe2O3 Nanoparticles Formed in Borate Glasses | Sciact - CRIS-system of Boreskov Institute of Catalysis

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

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

Authors

Edelman I. ¹ , Kliava J. ² , Ivanova O. ¹ , Ivantsov R. ¹ , Velikanov D. ^1,3 , Zaikovskii V. ⁴ , Petrakovskaja E. ¹ , Zubavichus Y. ⁵ , Stepanov S. ⁶

Affiliations

1	Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
2	LOMA, UMR 5798 Université de Bordeaux-CNRS, 33405 Talence cedex, France
3	Siberian Federal University, 660041 Krasnoyarsk, Russia
4	Boreskov Institute of Catalysis, Siberian Branch of RAS, 630090 Novosibirsk, Russia
5	NRC “Kurchatov Institute”, 123182 Moscow, Russia
6	Vavilov State Optical Institute, 199053 St.-Petersburg, Russia

Funding (1)

Federal Agency for Scientific Organizations

0356-2017-0030

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.

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 AN OpenAlex

Full text from publisher

Submitted:	Oct 29, 2018
Accepted:	Dec 21, 2018
Published online:	Jan 23, 2019
Published print:	Feb 15, 2019

Web of science:	WOS:000459524700011
Scopus:	2-s2.0-85060305805
Elibrary:	38699858
Chemical Abstracts:	2019:183850
OpenAlex:	W2912269022

DB	Citing
Scopus	7
Web of science	7
Elibrary	7
OpenAlex	6