https://doi.org/10.1140/epjp/s13360-024-05674-2
Regular Article
Temperature stability of hard-axis collapse and recoil-curve overshoot in Co films
1
Instituto de Física, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, Rio Grande do Sul, Brazil
2
Instituto Federal Sul-rio-grandense, 97574-360, Santana do Livramento, Rio Grande do Sul, Brazil
Received:
6
July
2024
Accepted:
20
September
2024
Published online:
5
October
2024
Magnetic hysteresis resembles as the most noteworthy and prominent phenomenon of ferromagnetism. Systems which display magnetization hard-axis collapse, i.e., sharp peaks in the angular variations of the remanent magnetization and coercivity centered ninety degrees off of the easy-magnetization direction, might also present recoil-curve overshoot—recoil magnetization branches that lie outside the major hysteresis loop. A key parameter responsible for the emergence and extension of both phenomena is the ratio between the exchange coupling and anisotropy energies. In general, in magnetic materials, it varies with the temperature, potentially resulting in important modifications in their characteristics. Here, we report on the variations of the magnetic properties of a 25-nm-thick Co film as the temperature is varied between 100 and 650 K. Employing an experimental data-driven phenomenological modeling approach, we were able to estimate the temperature dependence of the growth-induced anisotropy field of the film. We obtained that while the coercivity changes significantly, the principal hard-axis collapse and recoil-curve overshoot characteristics remain robust and very prominent in the whole temperature interval. Thus, apart from being intriguing from the physics perspective, these phenomena certainly warrant further investigations which, also due to their substantial thermal stability, should bring about new applications.
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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.
