Asymmetric Hysteresis Loops and Horizontal Loop Shifts in Purely Ferromagnetic Nanoparticles †
Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany
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Author to whom correspondence should be addressed.
†
Presented at the 2nd International Online-Conference on Nanomaterials, 15–30 November 2020; Available online: https://iocn2020.sciforum.net/ .
Academic Editors: Ana María Díez-Pascual, Antonio Di Bartolomeo and Guanying Chen
Mater. Proc. 2021, 4(1), 13; https://doi.org/10.3390/IOCN2020-07836
Published: 11 November 2020
(This article belongs to the Proceedings of The 2nd International Online-Conference on Nanomaterials)
Horizontally shifted and asymmetric hysteresis loops are often associated with exchange-biased samples, consisting of a ferromagnet exchange-coupled with an antiferromagnet. In purely ferromagnetic samples, such effects can occur due to undetected minor loops or thermal effects. Simulations of ferromagnetic nanostructures at zero temperature with sufficiently large saturation fields should not lead to such asymmetries. Here we report on micromagnetic simulations at zero temperature, performed on sputtered nanoparticles with different shapes. The small deviations of the systems due to random anisotropy orientations in the different grains can not only result in strong deviations of magnetization reversal processes and hysteresis loops, but also to distinctly asymmetric, horizontally shifted hysteresis loops in purely ferromagnetic nanoparticles.
Keywords:
pseudo-exchange bias; minor loop; micromagnetic simulation; OOMMF; spintronics
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MDPI and ACS Style
Detzmeier, J.; Königer, K.; Ehrmann, A. Asymmetric Hysteresis Loops and Horizontal Loop Shifts in Purely Ferromagnetic Nanoparticles. Mater. Proc. 2021, 4, 13. https://doi.org/10.3390/IOCN2020-07836
AMA Style
Detzmeier J, Königer K, Ehrmann A. Asymmetric Hysteresis Loops and Horizontal Loop Shifts in Purely Ferromagnetic Nanoparticles. Materials Proceedings. 2021; 4(1):13. https://doi.org/10.3390/IOCN2020-07836
Chicago/Turabian StyleDetzmeier, Joscha, Kevin Königer, and Andrea Ehrmann. 2021. "Asymmetric Hysteresis Loops and Horizontal Loop Shifts in Purely Ferromagnetic Nanoparticles" Materials Proceedings 4, no. 1: 13. https://doi.org/10.3390/IOCN2020-07836
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