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Tailoring magnetic anisotropy gradients by ion bombardment for domain wall positioning in magnetic multilayers with perpendicular anisotropy
Graded anisotropy magnetic materials possess a coercive field changing laterally with position. A simple fabrication procedure to produce such an anisotropy gradient in a polycrystalline Au/Co layer system without lateral thickness variation and with perpendicular magnetic anisotropy, prototypical f...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4155390/ https://www.ncbi.nlm.nih.gov/pubmed/25232291 http://dx.doi.org/10.1186/1556-276X-9-395 |
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author | Matczak, Michał Szymański, Bogdan Kuświk, Piotr Urbaniak, Maciej Stobiecki, Feliks Kurant, Zbigniew Maziewski, Andrzej Lengemann, Daniel Ehresmann, Arno |
author_facet | Matczak, Michał Szymański, Bogdan Kuświk, Piotr Urbaniak, Maciej Stobiecki, Feliks Kurant, Zbigniew Maziewski, Andrzej Lengemann, Daniel Ehresmann, Arno |
author_sort | Matczak, Michał |
collection | PubMed |
description | Graded anisotropy magnetic materials possess a coercive field changing laterally with position. A simple fabrication procedure to produce such an anisotropy gradient in a polycrystalline Au/Co layer system without lateral thickness variation and with perpendicular magnetic anisotropy, prototypical for a large variety of thin film systems, is shown. The procedure uses light-ion bombardment without the use of a mask. Magnetization reversal in this polycrystalline layer system takes place by unidirectional movement of a single domain wall only in regions with larger anisotropies and anisotropy gradients. In this anisotropy/anisotropy gradient regime, the domain wall is oriented perpendicular to the coercive field gradient, and it can be positioned along the gradient by an appropriate magnetic field pulse. For smaller anisotropies/anisotropy gradients, the natural anisotropy fluctuations of the polycrystalline layer system induce magnetization reversal dominated by domain nucleation. PACS: 75.30.Gw; 75.70.Cn; 75.60.Ch |
format | Online Article Text |
id | pubmed-4155390 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Springer |
record_format | MEDLINE/PubMed |
spelling | pubmed-41553902014-09-17 Tailoring magnetic anisotropy gradients by ion bombardment for domain wall positioning in magnetic multilayers with perpendicular anisotropy Matczak, Michał Szymański, Bogdan Kuświk, Piotr Urbaniak, Maciej Stobiecki, Feliks Kurant, Zbigniew Maziewski, Andrzej Lengemann, Daniel Ehresmann, Arno Nanoscale Res Lett Nano Express Graded anisotropy magnetic materials possess a coercive field changing laterally with position. A simple fabrication procedure to produce such an anisotropy gradient in a polycrystalline Au/Co layer system without lateral thickness variation and with perpendicular magnetic anisotropy, prototypical for a large variety of thin film systems, is shown. The procedure uses light-ion bombardment without the use of a mask. Magnetization reversal in this polycrystalline layer system takes place by unidirectional movement of a single domain wall only in regions with larger anisotropies and anisotropy gradients. In this anisotropy/anisotropy gradient regime, the domain wall is oriented perpendicular to the coercive field gradient, and it can be positioned along the gradient by an appropriate magnetic field pulse. For smaller anisotropies/anisotropy gradients, the natural anisotropy fluctuations of the polycrystalline layer system induce magnetization reversal dominated by domain nucleation. PACS: 75.30.Gw; 75.70.Cn; 75.60.Ch Springer 2014-08-13 /pmc/articles/PMC4155390/ /pubmed/25232291 http://dx.doi.org/10.1186/1556-276X-9-395 Text en Copyright © 2014 Matczak et al.; licensee Springer. http://creativecommons.org/licenses/by/4.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. |
spellingShingle | Nano Express Matczak, Michał Szymański, Bogdan Kuświk, Piotr Urbaniak, Maciej Stobiecki, Feliks Kurant, Zbigniew Maziewski, Andrzej Lengemann, Daniel Ehresmann, Arno Tailoring magnetic anisotropy gradients by ion bombardment for domain wall positioning in magnetic multilayers with perpendicular anisotropy |
title | Tailoring magnetic anisotropy gradients by ion bombardment for domain wall positioning in magnetic multilayers with perpendicular anisotropy |
title_full | Tailoring magnetic anisotropy gradients by ion bombardment for domain wall positioning in magnetic multilayers with perpendicular anisotropy |
title_fullStr | Tailoring magnetic anisotropy gradients by ion bombardment for domain wall positioning in magnetic multilayers with perpendicular anisotropy |
title_full_unstemmed | Tailoring magnetic anisotropy gradients by ion bombardment for domain wall positioning in magnetic multilayers with perpendicular anisotropy |
title_short | Tailoring magnetic anisotropy gradients by ion bombardment for domain wall positioning in magnetic multilayers with perpendicular anisotropy |
title_sort | tailoring magnetic anisotropy gradients by ion bombardment for domain wall positioning in magnetic multilayers with perpendicular anisotropy |
topic | Nano Express |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4155390/ https://www.ncbi.nlm.nih.gov/pubmed/25232291 http://dx.doi.org/10.1186/1556-276X-9-395 |
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