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Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex
We report on the enhancement of magnetic properties of multiwalled carbon nanotubes (MWNTs) functionalized with a gadolinium based supramolecular complex. By employing a newly developed synthesis technique we find that the functionalization method of the nanocomposite enhances the strength of magnet...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5966395/ https://www.ncbi.nlm.nih.gov/pubmed/29795177 http://dx.doi.org/10.1038/s41598-018-26428-y |
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author | Ncube, S. Coleman, C. Strydom, A. Flahaut, E. de Sousa, A. Bhattacharyya, S. |
author_facet | Ncube, S. Coleman, C. Strydom, A. Flahaut, E. de Sousa, A. Bhattacharyya, S. |
author_sort | Ncube, S. |
collection | PubMed |
description | We report on the enhancement of magnetic properties of multiwalled carbon nanotubes (MWNTs) functionalized with a gadolinium based supramolecular complex. By employing a newly developed synthesis technique we find that the functionalization method of the nanocomposite enhances the strength of magnetic interaction leading to a large effective moment of 15.79 µ(B) and non-superparamagnetic behaviour unlike what has been previously reported. Saturating resistance at low temperatures is fitted with the numerical renormalization group formula verifying the Kondo effect for magnetic impurities on a metallic electron system. Magnetoresistance shows devices fabricated from aligned gadolinium functionalized MWNTs (Gd-Fctn-MWNTs) exhibit spin-valve switching behaviour of up to 8%. This study highlights the possibility of enhancing magnetic interactions in carbon systems through chemical modification, moreover we demonstrate the rich physics that might be useful for developing spin based quantum computing elements based on one-dimensional (1D) channels. |
format | Online Article Text |
id | pubmed-5966395 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-59663952018-05-24 Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex Ncube, S. Coleman, C. Strydom, A. Flahaut, E. de Sousa, A. Bhattacharyya, S. Sci Rep Article We report on the enhancement of magnetic properties of multiwalled carbon nanotubes (MWNTs) functionalized with a gadolinium based supramolecular complex. By employing a newly developed synthesis technique we find that the functionalization method of the nanocomposite enhances the strength of magnetic interaction leading to a large effective moment of 15.79 µ(B) and non-superparamagnetic behaviour unlike what has been previously reported. Saturating resistance at low temperatures is fitted with the numerical renormalization group formula verifying the Kondo effect for magnetic impurities on a metallic electron system. Magnetoresistance shows devices fabricated from aligned gadolinium functionalized MWNTs (Gd-Fctn-MWNTs) exhibit spin-valve switching behaviour of up to 8%. This study highlights the possibility of enhancing magnetic interactions in carbon systems through chemical modification, moreover we demonstrate the rich physics that might be useful for developing spin based quantum computing elements based on one-dimensional (1D) channels. Nature Publishing Group UK 2018-05-23 /pmc/articles/PMC5966395/ /pubmed/29795177 http://dx.doi.org/10.1038/s41598-018-26428-y Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Ncube, S. Coleman, C. Strydom, A. Flahaut, E. de Sousa, A. Bhattacharyya, S. Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex |
title | Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex |
title_full | Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex |
title_fullStr | Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex |
title_full_unstemmed | Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex |
title_short | Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex |
title_sort | kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5966395/ https://www.ncbi.nlm.nih.gov/pubmed/29795177 http://dx.doi.org/10.1038/s41598-018-26428-y |
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