---
_id: '1579'
abstract:
- lang: eng
text: Asymmetric hysteresis loops can be found in exchange-bias systems in which
a ferromagnet is exchange-coupled with an antiferromagnet. In purely ferromagnetic
samples, such effects can occur due to undetected minor loops or thermal effects.
While the exchange bias is long established in hard-disk read/write heads and
diverse spintronics applications, minor loops are sometimes used for the calculation
of first order reversal curves (FORCs). Reports about their technological relevance,
however, are scarce. Here we report on micromagnetic simulations of a nanoparticle
with areas of varying height, consisting of tessellations of a defined area, in
which the shape anisotropy in narrow higher lines opposes magnetization reversal
stronger than in the larger, lower areas between, thus interacting similar to
hard/soft magnetic materials although consisting of the same material and thus
having identical magneto-crystalline anisotropy. After saturating this nanostructure
by a strong magnetic field pulse, distinctly asymmetric, horizontally shifted
hysteresis loops can be recognized, especially in the transverse magnetization
component. We show the influence of the external magnetic field orientation on
this asymmetry.
article_number: '168929'
article_type: original
author:
- first_name: Andrea
full_name: Ehrmann, Andrea
id: '223776'
last_name: Ehrmann
orcid: 0000-0003-0695-3905
orcid_put_code_url: https://api.orcid.org/v2.0/0000-0003-0695-3905/work/105572395
- first_name: T.
full_name: Blachowicz, T.
last_name: Blachowicz
citation:
alphadin: 'Ehrmann, Andrea ; Blachowicz, T.: Magnetization reversal
asymmetry in a structured ferromagnetic nanoparticle with varying shape anisotropy.
In: Journal of Magnetism and Magnetic Materials Bd. 546, Elsevier BV (2022)'
ama: Ehrmann A, Blachowicz T. Magnetization reversal asymmetry in a structured ferromagnetic
nanoparticle with varying shape anisotropy. Journal of Magnetism and Magnetic
Materials. 2022;546. doi:10.1016/j.jmmm.2021.168929
apa: Ehrmann, A., & Blachowicz, T. (2022). Magnetization reversal asymmetry
in a structured ferromagnetic nanoparticle with varying shape anisotropy. Journal
of Magnetism and Magnetic Materials, 546. https://doi.org/10.1016/j.jmmm.2021.168929
bibtex: '@article{Ehrmann_Blachowicz_2022, title={Magnetization reversal asymmetry
in a structured ferromagnetic nanoparticle with varying shape anisotropy}, volume={546},
DOI={10.1016/j.jmmm.2021.168929},
number={168929}, journal={Journal of Magnetism and Magnetic Materials}, publisher={Elsevier
BV}, author={Ehrmann, Andrea and Blachowicz, T.}, year={2022} }'
chicago: Ehrmann, Andrea, and T. Blachowicz. “Magnetization Reversal Asymmetry in
a Structured Ferromagnetic Nanoparticle with Varying Shape Anisotropy.” Journal
of Magnetism and Magnetic Materials 546 (2022). https://doi.org/10.1016/j.jmmm.2021.168929.
ieee: A. Ehrmann and T. Blachowicz, “Magnetization reversal asymmetry in a structured
ferromagnetic nanoparticle with varying shape anisotropy,” Journal of Magnetism
and Magnetic Materials, vol. 546, 2022.
mla: Ehrmann, Andrea, and T. Blachowicz. “Magnetization Reversal Asymmetry in a
Structured Ferromagnetic Nanoparticle with Varying Shape Anisotropy.” Journal
of Magnetism and Magnetic Materials, vol. 546, 168929, Elsevier BV, 2022,
doi:10.1016/j.jmmm.2021.168929.
short: A. Ehrmann, T. Blachowicz, Journal of Magnetism and Magnetic Materials 546
(2022).
date_created: 2022-01-01T12:48:51Z
date_updated: 2023-06-15T11:44:04Z
department:
- _id: '103'
doi: 10.1016/j.jmmm.2021.168929
intvolume: ' 546'
keyword:
- Pseudo-exchange bias Micromagnetic simulation Hysteresis loops Magnetic nanostructure
Tessellation
language:
- iso: eng
main_file_link:
- url: https://doi.org/10.1016/j.jmmm.2021.168929
publication: Journal of Magnetism and Magnetic Materials
publication_identifier:
issn:
- '03048853'
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Magnetization reversal asymmetry in a structured ferromagnetic nanoparticle
with varying shape anisotropy
type: journal_article
user_id: '245590'
volume: 546
year: '2022'
...