Abstract
We have studied the magnetic properties of two-phase borosilicate glasses with matrices containing a mixture of β-Fe2O3 and Fe3O4 nanoparticles. The dimensions of the oxide nanoparticles are determined, and the temperature of blocking (TB ~ 330 K) of the ensemble of superparamagnetic nanoparticles is estimated. It is also established that a sharp increase in the specific magnetization of these glasses when the Néel temperature is approached (and, below it, for bulk β-Fe2O3).
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ACKNOWLEDGMENTS
The authors are grateful to I.V. Golosovskii (St. Petersburg Nuclear Physics Institute, National Research Center “Kurchatov Institute”) for his help in conducting XRD measurements.
Funding
S.A. Borisov gratefully acknowledges partial support from the Russian Foundation for Basic Research, project no. 19-02-00760. A. A. Naberezhnov is grateful to DAAD (Germany) grant of Research Stays for University Academics and Scientists 57442043 for support of works performed in the Leibniz University of Hannover (ETP).
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Translated by P. Pozdeev
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Borisov, S.A., Naberezhnov, A.A., Nacke, B. et al. Magnetic Properties of Two-Phase Borosilicate Glasses Containing β-Fe2O3 and Fe3O4 Nanoparticles. Tech. Phys. Lett. 46, 808–811 (2020). https://doi.org/10.1134/S1063785020080180
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DOI: https://doi.org/10.1134/S1063785020080180