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Creep turns linear in narrow ferromagnetic nanostrips
The motion of domain walls in magnetic materials is a typical example of a creep process, usually characterised by a stretched exponential velocity-force relation. By performing large-scale micromagnetic simulations, and analyzing an extended 1D model which takes the effects of finite temperatures a...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4740894/ https://www.ncbi.nlm.nih.gov/pubmed/26843125 http://dx.doi.org/10.1038/srep20472 |
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author | Leliaert, Jonathan Van de Wiele, Ben Vansteenkiste, Arne Laurson, Lasse Durin, Gianfranco Dupré, Luc Van Waeyenberge, Bartel |
author_facet | Leliaert, Jonathan Van de Wiele, Ben Vansteenkiste, Arne Laurson, Lasse Durin, Gianfranco Dupré, Luc Van Waeyenberge, Bartel |
author_sort | Leliaert, Jonathan |
collection | PubMed |
description | The motion of domain walls in magnetic materials is a typical example of a creep process, usually characterised by a stretched exponential velocity-force relation. By performing large-scale micromagnetic simulations, and analyzing an extended 1D model which takes the effects of finite temperatures and material defects into account, we show that this creep scaling law breaks down in sufficiently narrow ferromagnetic strips. Our analysis of current-driven transverse domain wall motion in disordered Permalloy nanostrips reveals instead a creep regime with a linear dependence of the domain wall velocity on the applied field or current density. This originates from the essentially point-like nature of domain walls moving in narrow, line- like disordered nanostrips. An analogous linear relation is found also by analyzing existing experimental data on field-driven domain wall motion in perpendicularly magnetised media. |
format | Online Article Text |
id | pubmed-4740894 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-47408942016-02-09 Creep turns linear in narrow ferromagnetic nanostrips Leliaert, Jonathan Van de Wiele, Ben Vansteenkiste, Arne Laurson, Lasse Durin, Gianfranco Dupré, Luc Van Waeyenberge, Bartel Sci Rep Article The motion of domain walls in magnetic materials is a typical example of a creep process, usually characterised by a stretched exponential velocity-force relation. By performing large-scale micromagnetic simulations, and analyzing an extended 1D model which takes the effects of finite temperatures and material defects into account, we show that this creep scaling law breaks down in sufficiently narrow ferromagnetic strips. Our analysis of current-driven transverse domain wall motion in disordered Permalloy nanostrips reveals instead a creep regime with a linear dependence of the domain wall velocity on the applied field or current density. This originates from the essentially point-like nature of domain walls moving in narrow, line- like disordered nanostrips. An analogous linear relation is found also by analyzing existing experimental data on field-driven domain wall motion in perpendicularly magnetised media. Nature Publishing Group 2016-02-04 /pmc/articles/PMC4740894/ /pubmed/26843125 http://dx.doi.org/10.1038/srep20472 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Leliaert, Jonathan Van de Wiele, Ben Vansteenkiste, Arne Laurson, Lasse Durin, Gianfranco Dupré, Luc Van Waeyenberge, Bartel Creep turns linear in narrow ferromagnetic nanostrips |
title | Creep turns linear in narrow ferromagnetic nanostrips |
title_full | Creep turns linear in narrow ferromagnetic nanostrips |
title_fullStr | Creep turns linear in narrow ferromagnetic nanostrips |
title_full_unstemmed | Creep turns linear in narrow ferromagnetic nanostrips |
title_short | Creep turns linear in narrow ferromagnetic nanostrips |
title_sort | creep turns linear in narrow ferromagnetic nanostrips |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4740894/ https://www.ncbi.nlm.nih.gov/pubmed/26843125 http://dx.doi.org/10.1038/srep20472 |
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