https://doi.org/10.1140/epjp/s13360-024-05217-9
Regular Article
Temperature dependence of exchange-spring interaction in core–shell Co0.6Zn0.4Fe2O4/ SrFe12O19 magnetic nanofibers
Department of Physics, Isfahan University of Technology, 84156-83111, Isfahan, Iran
Received:
5
February
2024
Accepted:
26
April
2024
Published online:
21
May
2024
The study investigated the temperature dependence of the exchange-spring interaction in core–shell Co0.6Zn0.4Fe2O4 (core)/SrFe12O19 (shell) magnetic nanofibers. It was found that the squareness of the exchange-spring magnets, and thus the exchange-spring interaction, actually improved as the temperature decreased. The research found that the temperature trends of the soft phase exchange field (Hex) and the Bloch wall width of the hard phase (δh) are crucial in determining how the exchange-spring interaction functions under temperature changes. A competition between the temperature trends of Hex and δh was observed, where decreasing the temperature led to an increase in Hex (improving the exchange-spring interaction) and a decrease in δh (deteriorating the exchange-spring interaction). The study suggests that the Curie temperature (Tc) and the function of the temperature trend (τ) play vital roles in the rate of change of Hex and δh. Considering the Tc of the soft and hard phases and the τ of Hex and δh, it was observed that the rate of increase in Hex became greater than the rate of decrease in δh with decreasing temperature. Therefore, the study concludes that the exchange-spring interaction improved with a reduction in temperature.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
