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Superconducting magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers
Magnetoresistance is a multifaceted effect reflecting the diverse transport mechanisms exhibited by different kinds of plain materials and hybrid nanostructures; among other, giant, colossal, and extraordinary magnetoresistance versions exist, with the notation indicative of the intensity. Here we r...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4549620/ https://www.ncbi.nlm.nih.gov/pubmed/26306543 http://dx.doi.org/10.1038/srep13420 |
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author | Stamopoulos, D. Aristomenopoulou, E. |
author_facet | Stamopoulos, D. Aristomenopoulou, E. |
author_sort | Stamopoulos, D. |
collection | PubMed |
description | Magnetoresistance is a multifaceted effect reflecting the diverse transport mechanisms exhibited by different kinds of plain materials and hybrid nanostructures; among other, giant, colossal, and extraordinary magnetoresistance versions exist, with the notation indicative of the intensity. Here we report on the superconducting magnetoresistance observed in ferromagnet/superconductor/ferromagnet trilayers, namely Co/Nb/Co trilayers, subjected to a parallel external magnetic field equal to the coercive field. By manipulating the transverse stray dipolar fields that originate from the out-of-plane magnetic domains of the outer layers that develop at coercivity, we can suppress the supercurrent of the interlayer. We experimentally demonstrate a scaling of the magnetoresistance magnitude that we reproduce with a closed-form phenomenological formula that incorporates relevant macroscopic parameters and microscopic length scales of the superconducting and ferromagnetic structural units. The generic approach introduced here can be used to design novel cryogenic devices that completely switch the supercurrent ‘on’ and ‘off’, thus exhibiting the ultimate magnetoresistance magnitude 100% on a regular basis. |
format | Online Article Text |
id | pubmed-4549620 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-45496202015-08-26 Superconducting magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers Stamopoulos, D. Aristomenopoulou, E. Sci Rep Article Magnetoresistance is a multifaceted effect reflecting the diverse transport mechanisms exhibited by different kinds of plain materials and hybrid nanostructures; among other, giant, colossal, and extraordinary magnetoresistance versions exist, with the notation indicative of the intensity. Here we report on the superconducting magnetoresistance observed in ferromagnet/superconductor/ferromagnet trilayers, namely Co/Nb/Co trilayers, subjected to a parallel external magnetic field equal to the coercive field. By manipulating the transverse stray dipolar fields that originate from the out-of-plane magnetic domains of the outer layers that develop at coercivity, we can suppress the supercurrent of the interlayer. We experimentally demonstrate a scaling of the magnetoresistance magnitude that we reproduce with a closed-form phenomenological formula that incorporates relevant macroscopic parameters and microscopic length scales of the superconducting and ferromagnetic structural units. The generic approach introduced here can be used to design novel cryogenic devices that completely switch the supercurrent ‘on’ and ‘off’, thus exhibiting the ultimate magnetoresistance magnitude 100% on a regular basis. Nature Publishing Group 2015-08-26 /pmc/articles/PMC4549620/ /pubmed/26306543 http://dx.doi.org/10.1038/srep13420 Text en Copyright © 2015, 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 Stamopoulos, D. Aristomenopoulou, E. Superconducting magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers |
title | Superconducting magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers |
title_full | Superconducting magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers |
title_fullStr | Superconducting magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers |
title_full_unstemmed | Superconducting magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers |
title_short | Superconducting magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers |
title_sort | superconducting magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4549620/ https://www.ncbi.nlm.nih.gov/pubmed/26306543 http://dx.doi.org/10.1038/srep13420 |
work_keys_str_mv | AT stamopoulosd superconductingmagnetoresistanceinferromagnetsuperconductorferromagnettrilayers AT aristomenopouloue superconductingmagnetoresistanceinferromagnetsuperconductorferromagnettrilayers |