Magnetization Reversal in Concave Iron Nano-Superellipses

E. Öncü, A. Ehrmann, Condensed Matter 6 (2021).

Artikel | Veröffentlicht | Englisch
Autor*in
Öncü, Emre; Ehrmann, AndreaFH Bielefeld
Abstract
Square magnetic nanodots can show intentional or undesired shape modifications, resulting in superellipses with concave or convex edges. Some research groups also concentrated on experimentally investigating or simulating concave nano-superellipses, sometimes called magnetic astroids due to their similarity to the mathematical shape of an astroid. Due to the strong impact of shape anisotropy in nanostructures, the magnetization-reversal process including coercive and reversibility fields can be expected to be different in concave or convex superellipses than that in common squares. Here, we present angle-dependent micromagnetic simulations on magnetic nanodots with the shape of concave superellipses. While magnetization reversal occurs via meander states, horseshoe states or the 180° rotation of magnetization for the perfect square, depending on the angle of the external magnetic field, more complicated states occur for superellipses with strong concaveness. Even apparently asymmetric hysteresis loops can be found along the hard magnetization directions, which can be attributed to measuring minor loops since the reversibility fields become much larger than the coercive fields.
Erscheinungsjahr
Zeitschriftentitel
Condensed Matter
Band
6
Zeitschriftennummer
2
Artikelnummer
17
eISSN
FH-PUB-ID

Zitieren

Öncü, Emre ; Ehrmann, Andrea: Magnetization Reversal in Concave Iron Nano-Superellipses. In: Condensed Matter Bd. 6, MDPI AG (2021), Nr. 2
Öncü E, Ehrmann A. Magnetization Reversal in Concave Iron Nano-Superellipses. Condensed Matter. 2021;6(2). doi:10.3390/condmat6020017
Öncü, E., & Ehrmann, A. (2021). Magnetization Reversal in Concave Iron Nano-Superellipses. Condensed Matter, 6(2). https://doi.org/10.3390/condmat6020017
@article{Öncü_Ehrmann_2021, title={Magnetization Reversal in Concave Iron Nano-Superellipses}, volume={6}, DOI={10.3390/condmat6020017}, number={217}, journal={Condensed Matter}, publisher={MDPI AG}, author={Öncü, Emre and Ehrmann, Andrea}, year={2021} }
Öncü, Emre, and Andrea Ehrmann. “Magnetization Reversal in Concave Iron Nano-Superellipses.” Condensed Matter 6, no. 2 (2021). https://doi.org/10.3390/condmat6020017.
E. Öncü and A. Ehrmann, “Magnetization Reversal in Concave Iron Nano-Superellipses,” Condensed Matter, vol. 6, no. 2, 2021.
Öncü, Emre, and Andrea Ehrmann. “Magnetization Reversal in Concave Iron Nano-Superellipses.” Condensed Matter, vol. 6, no. 2, 17, MDPI AG, 2021, doi:10.3390/condmat6020017.
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