---
_id: '1601'
abstract:
- lang: eng
text: " Combining soft and hard magnetic materials is not only
of technological importance in diverse spintronics elements, but also of high
interest in basic research. Here, we report on different arrays combining iron
and nickel, e.g., by embedding circular nanodots of one material in a matrix of
the other. Micromagnetic simulations were performed using OOMMF. Our results show
that magnetization reversal processes are strongly influenced by neighboring nanodots
and the magnetic matrix in which the nanodots are embedded, respectively, which
becomes macroscopically visible by several steps along the slopes of the hysteresis
loops. Such material combinations allow for preparing quaternary memories and
are thus highly relevant for applications in data storage and processing.\r\n
\ "
article_number: '80'
article_type: original
author:
- first_name: Devika
full_name: Sudsom, Devika
last_name: Sudsom
- 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/105572105
citation:
alphadin: 'Sudsom, Devika ; Ehrmann, Andrea: Micromagnetic Simulations
of Magnetic Particles Embedded in Magnetic or Non-Magnetic Matrices. In: Materials
Proceedings Bd. 4, MDPI AG (2021), Nr. 1'
ama: Sudsom D, Ehrmann A. Micromagnetic Simulations of Magnetic Particles Embedded
in Magnetic or Non-Magnetic Matrices. Materials Proceedings. 2021;4(1).
doi:10.3390/IOCN2020-07940
apa: Sudsom, D., & Ehrmann, A. (2021). Micromagnetic Simulations of Magnetic
Particles Embedded in Magnetic or Non-Magnetic Matrices. Materials Proceedings,
4(1). https://doi.org/10.3390/IOCN2020-07940
bibtex: '@article{Sudsom_Ehrmann_2021, title={Micromagnetic Simulations of Magnetic
Particles Embedded in Magnetic or Non-Magnetic Matrices}, volume={4}, DOI={10.3390/IOCN2020-07940}, number={180},
journal={Materials Proceedings}, publisher={MDPI AG}, author={Sudsom, Devika and
Ehrmann, Andrea}, year={2021} }'
chicago: Sudsom, Devika, and Andrea Ehrmann. “Micromagnetic Simulations of Magnetic
Particles Embedded in Magnetic or Non-Magnetic Matrices.” Materials Proceedings
4, no. 1 (2021). https://doi.org/10.3390/IOCN2020-07940.
ieee: D. Sudsom and A. Ehrmann, “Micromagnetic Simulations of Magnetic Particles
Embedded in Magnetic or Non-Magnetic Matrices,” Materials Proceedings,
vol. 4, no. 1, 2021.
mla: Sudsom, Devika, and Andrea Ehrmann. “Micromagnetic Simulations of Magnetic
Particles Embedded in Magnetic or Non-Magnetic Matrices.” Materials Proceedings,
vol. 4, no. 1, 80, MDPI AG, 2021, doi:10.3390/IOCN2020-07940.
short: D. Sudsom, A. Ehrmann, Materials Proceedings 4 (2021).
date_created: 2022-01-01T14:11:21Z
date_updated: 2022-01-01T15:09:20Z
department:
- _id: '103'
doi: 10.3390/IOCN2020-07940
intvolume: ' 4'
issue: '1'
keyword:
- micromagnetic simulation
- OOMMF
- nanodots
- antidots
- array
- spintronics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3390/IOCN2020-07940
oa: '1'
publication: Materials Proceedings
publication_identifier:
eissn:
- 2673-4605
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Micromagnetic Simulations of Magnetic Particles Embedded in Magnetic or Non-Magnetic
Matrices
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: '223776'
volume: 4
year: '2021'
...
---
_id: '1603'
abstract:
- lang: eng
text: " Magnetic nanodots are of high interest for basic research
due to their broad spectrum of possible magnetic states and magnetization reversal
processes. Besides, they are of technological interest since they can be applied
in magnetic data storage, especially if vortex states occur in closed dots or
open rings. While producing such nanorings and nanodots from diverse magnetic
materials by lithographic techniques is quite common nowadays, these production
technologies are naturally prone to small deviations of the borders of these nanoparticles.
Here we investigate the influence of well-defined angular-dependent roughness
of the edges, created by building the nanoparticles from small cubes, on the resulting
hysteresis loops and magnetization reversal processes in five different round
nanodots with varying open areas, from a thin ring to a closed nanodot. By varying
the orientation of the external magnetic field, the impact of the angle-dependent
roughness can be estimated. Especially for the thinnest ring, significant dependence
of the transverse magnetization component on the field orientation can be found.\r\n
\ "
article_number: '19'
article_type: original
author:
- first_name: Pia
full_name: Steinmetz, Pia
last_name: Steinmetz
- 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/105572063
citation:
alphadin: 'Steinmetz, Pia ; Ehrmann, Andrea: Micromagnetic Simulation
of Round Ferromagnetic Nanodots with Varying Roughness and Symmetry. In: Condensed
Matter Bd. 6, MDPI AG (2021), Nr. 2'
ama: Steinmetz P, Ehrmann A. Micromagnetic Simulation of Round Ferromagnetic Nanodots
with Varying Roughness and Symmetry. Condensed Matter. 2021;6(2). doi:10.3390/condmat6020019
apa: Steinmetz, P., & Ehrmann, A. (2021). Micromagnetic Simulation of Round
Ferromagnetic Nanodots with Varying Roughness and Symmetry. Condensed Matter,
6(2). https://doi.org/10.3390/condmat6020019
bibtex: '@article{Steinmetz_Ehrmann_2021, title={Micromagnetic Simulation of Round
Ferromagnetic Nanodots with Varying Roughness and Symmetry}, volume={6}, DOI={10.3390/condmat6020019}, number={219},
journal={Condensed Matter}, publisher={MDPI AG}, author={Steinmetz, Pia and Ehrmann,
Andrea}, year={2021} }'
chicago: Steinmetz, Pia, and Andrea Ehrmann. “Micromagnetic Simulation of Round
Ferromagnetic Nanodots with Varying Roughness and Symmetry.” Condensed Matter
6, no. 2 (2021). https://doi.org/10.3390/condmat6020019.
ieee: P. Steinmetz and A. Ehrmann, “Micromagnetic Simulation of Round Ferromagnetic
Nanodots with Varying Roughness and Symmetry,” Condensed Matter, vol. 6,
no. 2, 2021.
mla: Steinmetz, Pia, and Andrea Ehrmann. “Micromagnetic Simulation of Round Ferromagnetic
Nanodots with Varying Roughness and Symmetry.” Condensed Matter, vol. 6,
no. 2, 19, MDPI AG, 2021, doi:10.3390/condmat6020019.
short: P. Steinmetz, A. Ehrmann, Condensed Matter 6 (2021).
date_created: 2022-01-01T14:13:48Z
date_updated: 2022-01-01T15:08:21Z
department:
- _id: '103'
doi: 10.3390/condmat6020019
intvolume: ' 6'
issue: '2'
keyword:
- OOMMF (Object Orientated MicroMagnetic Framework)
- nanostructure
- iron
- vortex state
- domain wall
- rough borders
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3390/condmat6020019
oa: '1'
publication: Condensed Matter
publication_identifier:
eissn:
- 2410-3896
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Micromagnetic Simulation of Round Ferromagnetic Nanodots with Varying Roughness
and Symmetry
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: '223776'
volume: 6
year: '2021'
...
---
_id: '1606'
abstract:
- lang: eng
text: " 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.\r\n "
article_number: '17'
article_type: original
author:
- first_name: Emre
full_name: Öncü, Emre
last_name: Öncü
- 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/105572027
citation:
alphadin: 'Öncü, Emre ; Ehrmann,
Andrea: Magnetization Reversal in Concave Iron Nano-Superellipses. In:
Condensed Matter Bd. 6, MDPI AG (2021), Nr. 2'
ama: Öncü E, Ehrmann A. Magnetization Reversal in Concave Iron Nano-Superellipses.
Condensed Matter. 2021;6(2). doi:10.3390/condmat6020017
apa: Öncü, E., & Ehrmann, A. (2021). Magnetization Reversal in Concave Iron
Nano-Superellipses. Condensed Matter, 6(2). https://doi.org/10.3390/condmat6020017
bibtex: '@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} }'
chicago: Öncü, Emre, and Andrea Ehrmann. “Magnetization Reversal in Concave Iron
Nano-Superellipses.” Condensed Matter 6, no. 2 (2021). https://doi.org/10.3390/condmat6020017.
ieee: E. Öncü and A. Ehrmann, “Magnetization Reversal in Concave Iron Nano-Superellipses,”
Condensed Matter, vol. 6, no. 2, 2021.
mla: 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.
short: E. Öncü, A. Ehrmann, Condensed Matter 6 (2021).
date_created: 2022-01-01T14:17:07Z
date_updated: 2022-01-01T15:07:03Z
department:
- _id: '103'
doi: 10.3390/condmat6020017
intvolume: ' 6'
issue: '2'
keyword:
- nanostructure
- iron
- object-orientated micromagnetic framework (OOMMF)
- asymmetry
- minor loop
- coercive field
- reversibility field
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3390/condmat6020017
oa: '1'
publication: Condensed Matter
publication_identifier:
eissn:
- 2410-3896
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Magnetization Reversal in Concave Iron Nano-Superellipses
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: '223776'
volume: 6
year: '2021'
...
---
_id: '1611'
abstract:
- lang: eng
text: " 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.\r\n "
article_number: '13'
article_type: original
author:
- first_name: Joscha
full_name: Detzmeier, Joscha
last_name: Detzmeier
- first_name: Kevin
full_name: Königer, Kevin
last_name: Königer
- 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/105571903
citation:
alphadin: 'Detzmeier, Joscha ; Königer, Kevin ; Ehrmann,
Andrea: Asymmetric Hysteresis Loops and Horizontal Loop Shifts in Purely
Ferromagnetic Nanoparticles. In: Materials Proceedings Bd. 4, MDPI AG (2021),
Nr. 1'
ama: Detzmeier J, Königer K, Ehrmann A. Asymmetric Hysteresis Loops and Horizontal
Loop Shifts in Purely Ferromagnetic Nanoparticles. Materials Proceedings.
2021;4(1). doi:10.3390/IOCN2020-07836
apa: Detzmeier, J., Königer, K., & Ehrmann, A. (2021). Asymmetric Hysteresis
Loops and Horizontal Loop Shifts in Purely Ferromagnetic Nanoparticles. Materials
Proceedings, 4(1). https://doi.org/10.3390/IOCN2020-07836
bibtex: '@article{Detzmeier_Königer_Ehrmann_2021, title={Asymmetric Hysteresis Loops
and Horizontal Loop Shifts in Purely Ferromagnetic Nanoparticles}, volume={4},
DOI={10.3390/IOCN2020-07836},
number={113}, journal={Materials Proceedings}, publisher={MDPI AG}, author={Detzmeier,
Joscha and Königer, Kevin and Ehrmann, Andrea}, year={2021} }'
chicago: Detzmeier, Joscha, Kevin Königer, and Andrea Ehrmann. “Asymmetric Hysteresis
Loops and Horizontal Loop Shifts in Purely Ferromagnetic Nanoparticles.” Materials
Proceedings 4, no. 1 (2021). https://doi.org/10.3390/IOCN2020-07836.
ieee: J. Detzmeier, K. Königer, and A. Ehrmann, “Asymmetric Hysteresis Loops and
Horizontal Loop Shifts in Purely Ferromagnetic Nanoparticles,” Materials Proceedings,
vol. 4, no. 1, 2021.
mla: Detzmeier, Joscha, et al. “Asymmetric Hysteresis Loops and Horizontal Loop
Shifts in Purely Ferromagnetic Nanoparticles.” Materials Proceedings, vol.
4, no. 1, 13, MDPI AG, 2021, doi:10.3390/IOCN2020-07836.
short: J. Detzmeier, K. Königer, A. Ehrmann, Materials Proceedings 4 (2021).
date_created: 2022-01-01T14:21:55Z
date_updated: 2022-01-01T15:03:42Z
department:
- _id: '103'
doi: 10.3390/IOCN2020-07836
intvolume: ' 4'
issue: '1'
keyword:
- pseudo-exchange bias
- minor loop
- micromagnetic simulation
- OOMMF
- spintronics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3390/IOCN2020-07836
oa: '1'
publication: Materials Proceedings
publication_identifier:
eissn:
- 2673-4605
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Asymmetric Hysteresis Loops and Horizontal Loop Shifts in Purely Ferromagnetic
Nanoparticles
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: '223776'
volume: 4
year: '2021'
...
---
_id: '1614'
abstract:
- lang: eng
text: " 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 structures. 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 lead to distinctly asymmetric, horizontally shifted
hysteresis loops in purely ferromagnetic nanoparticles.\r\n "
article_number: '800'
article_type: original
author:
- first_name: Joscha
full_name: Detzmeier, Joscha
last_name: Detzmeier
- first_name: Kevin
full_name: Königer, Kevin
last_name: Königer
- first_name: Tomasz
full_name: Blachowicz, Tomasz
last_name: Blachowicz
- 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/105571822
citation:
alphadin: 'Detzmeier, Joscha ; Königer, Kevin ; Blachowicz,
Tomasz ; Ehrmann, Andrea:
Asymmetric Hysteresis Loops in Structured Ferromagnetic Nanoparticles with Hard/Soft
Areas. In: Nanomaterials Bd. 11, MDPI AG (2021), Nr. 3'
ama: Detzmeier J, Königer K, Blachowicz T, Ehrmann A. Asymmetric Hysteresis Loops
in Structured Ferromagnetic Nanoparticles with Hard/Soft Areas. Nanomaterials.
2021;11(3). doi:10.3390/nano11030800
apa: Detzmeier, J., Königer, K., Blachowicz, T., & Ehrmann, A. (2021). Asymmetric
Hysteresis Loops in Structured Ferromagnetic Nanoparticles with Hard/Soft Areas.
Nanomaterials, 11(3). https://doi.org/10.3390/nano11030800
bibtex: '@article{Detzmeier_Königer_Blachowicz_Ehrmann_2021, title={Asymmetric Hysteresis
Loops in Structured Ferromagnetic Nanoparticles with Hard/Soft Areas}, volume={11},
DOI={10.3390/nano11030800},
number={3800}, journal={Nanomaterials}, publisher={MDPI AG}, author={Detzmeier,
Joscha and Königer, Kevin and Blachowicz, Tomasz and Ehrmann, Andrea}, year={2021}
}'
chicago: Detzmeier, Joscha, Kevin Königer, Tomasz Blachowicz, and Andrea Ehrmann.
“Asymmetric Hysteresis Loops in Structured Ferromagnetic Nanoparticles with Hard/Soft
Areas.” Nanomaterials 11, no. 3 (2021). https://doi.org/10.3390/nano11030800.
ieee: J. Detzmeier, K. Königer, T. Blachowicz, and A. Ehrmann, “Asymmetric Hysteresis
Loops in Structured Ferromagnetic Nanoparticles with Hard/Soft Areas,” Nanomaterials,
vol. 11, no. 3, 2021.
mla: Detzmeier, Joscha, et al. “Asymmetric Hysteresis Loops in Structured Ferromagnetic
Nanoparticles with Hard/Soft Areas.” Nanomaterials, vol. 11, no. 3, 800,
MDPI AG, 2021, doi:10.3390/nano11030800.
short: J. Detzmeier, K. Königer, T. Blachowicz, A. Ehrmann, Nanomaterials 11 (2021).
date_created: 2022-01-01T14:26:01Z
date_updated: 2022-01-01T15:02:14Z
department:
- _id: '103'
doi: 10.3390/nano11030800
intvolume: ' 11'
issue: '3'
keyword:
- pseudo-exchange bias
- minor loop
- micromagnetic simulation
- OOMMF
- spintronics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3390/nano11030800
oa: '1'
publication: Nanomaterials
publication_identifier:
eissn:
- 2079-4991
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Asymmetric Hysteresis Loops in Structured Ferromagnetic Nanoparticles with
Hard/Soft Areas
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: '223776'
volume: 11
year: '2021'
...
---
_id: '1624'
abstract:
- lang: eng
text: " Combining clusters of magnetic materials with a matrix
of other magnetic materials is very interesting for basic research because new,
possibly technologically applicable magnetic properties or magnetization reversal
processes may be found. Here we report on different arrays combining iron and
nickel, for example, by surrounding circular nanodots of one material with a matrix
of the other or by combining iron and nickel nanodots in air. Micromagnetic simulations
were performed using the OOMMF (Object Oriented MicroMagnetic Framework). Our
results show that magnetization reversal processes are strongly influenced by
neighboring nanodots and the magnetic matrix by which the nanodots are surrounded,
respectively, which becomes macroscopically visible by several steps along the
slopes of the hysteresis loops. Such material combinations allow for preparing
quaternary memory systems, and are thus highly relevant for applications in data
storage and processing.\r\n "
article_number: '349'
article_type: original
author:
- first_name: Devika
full_name: Sudsom, Devika
last_name: Sudsom
- 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/105571441
citation:
alphadin: 'Sudsom, Devika ; Ehrmann, Andrea: Micromagnetic Simulations
of Fe and Ni Nanodot Arrays Surrounded by Magnetic or Non-Magnetic Matrices. In:
Nanomaterials Bd. 11, MDPI AG (2021), Nr. 2'
ama: Sudsom D, Ehrmann A. Micromagnetic Simulations of Fe and Ni Nanodot Arrays
Surrounded by Magnetic or Non-Magnetic Matrices. Nanomaterials. 2021;11(2).
doi:10.3390/nano11020349
apa: Sudsom, D., & Ehrmann, A. (2021). Micromagnetic Simulations of Fe and Ni
Nanodot Arrays Surrounded by Magnetic or Non-Magnetic Matrices. Nanomaterials,
11(2). https://doi.org/10.3390/nano11020349
bibtex: '@article{Sudsom_Ehrmann_2021, title={Micromagnetic Simulations of Fe and
Ni Nanodot Arrays Surrounded by Magnetic or Non-Magnetic Matrices}, volume={11},
DOI={10.3390/nano11020349},
number={2349}, journal={Nanomaterials}, publisher={MDPI AG}, author={Sudsom, Devika
and Ehrmann, Andrea}, year={2021} }'
chicago: Sudsom, Devika, and Andrea Ehrmann. “Micromagnetic Simulations of Fe and
Ni Nanodot Arrays Surrounded by Magnetic or Non-Magnetic Matrices.” Nanomaterials
11, no. 2 (2021). https://doi.org/10.3390/nano11020349.
ieee: D. Sudsom and A. Ehrmann, “Micromagnetic Simulations of Fe and Ni Nanodot
Arrays Surrounded by Magnetic or Non-Magnetic Matrices,” Nanomaterials,
vol. 11, no. 2, 2021.
mla: Sudsom, Devika, and Andrea Ehrmann. “Micromagnetic Simulations of Fe and Ni
Nanodot Arrays Surrounded by Magnetic or Non-Magnetic Matrices.” Nanomaterials,
vol. 11, no. 2, 349, MDPI AG, 2021, doi:10.3390/nano11020349.
short: D. Sudsom, A. Ehrmann, Nanomaterials 11 (2021).
date_created: 2022-01-01T14:37:18Z
date_updated: 2022-01-01T14:55:38Z
department:
- _id: '103'
doi: 10.3390/nano11020349
intvolume: ' 11'
issue: '2'
keyword:
- micromagnetic simulation
- OOMMF
- nanodots
- antidots
- array
- spintronics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3390/nano11020349
oa: '1'
publication: Nanomaterials
publication_identifier:
eissn:
- 2079-4991
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Micromagnetic Simulations of Fe and Ni Nanodot Arrays Surrounded by Magnetic
or Non-Magnetic Matrices
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: '223776'
volume: 11
year: '2021'
...
---
_id: '684'
abstract:
- lang: eng
text: 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.
author:
- first_name: 'Joscha '
full_name: 'Detzmeier, Joscha '
last_name: Detzmeier
- first_name: 'Kevin '
full_name: 'Königer, Kevin '
last_name: Königer
- first_name: Andrea
full_name: Ehrmann, Andrea
id: '223776'
last_name: Ehrmann
orcid: 0000-0003-0695-3905
conference:
end_date: 30 November 2020
location: online
name: 2nd International Online-Conference on Nanomaterials
start_date: 15 November 2020
date_created: 2021-01-03T17:59:28Z
date_updated: 2021-01-18T15:32:28Z
ddc:
- '620'
department:
- _id: '103'
file:
- access_level: open_access
content_type: application/pdf
creator: aehrmann
date_created: 2021-01-03T17:58:31Z
date_updated: 2021-01-03T17:58:31Z
file_id: '685'
file_name: 2020_Detzmeier_Sciforum.pdf
file_size: 506951
relation: main_file
success: 1
file_date_updated: 2021-01-03T17:58:31Z
has_accepted_license: '1'
keyword:
- pseudo-exchange bias
- minor loop
- micromagnetic simulation
- OOMMF
- spintronics
language:
- iso: eng
oa: '1'
publication: 2nd International Online-Conference on Nanomaterials
publication_status: published
publisher: MDPI
quality_controlled: '1'
status: public
title: ' Asymmetric hysteresis loops and horizontal loop shifts in purely ferromagnetic
nanoparticles'
type: conference
user_id: '223776'
year: '2020'
...