Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Ncube, S., Coleman, C., Strydom, A., Flahaut, E., de Sousa, A., Bhattacharyya, S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
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
_version_ 1783325447857111040
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
work_keys_str_mv AT ncubes kondoeffectandenhancedmagneticpropertiesingadoliniumfunctionalizedcarbonnanotubesupramolecularcomplex
AT colemanc kondoeffectandenhancedmagneticpropertiesingadoliniumfunctionalizedcarbonnanotubesupramolecularcomplex
AT strydoma kondoeffectandenhancedmagneticpropertiesingadoliniumfunctionalizedcarbonnanotubesupramolecularcomplex
AT flahaute kondoeffectandenhancedmagneticpropertiesingadoliniumfunctionalizedcarbonnanotubesupramolecularcomplex
AT desousaa kondoeffectandenhancedmagneticpropertiesingadoliniumfunctionalizedcarbonnanotubesupramolecularcomplex
AT bhattacharyyas kondoeffectandenhancedmagneticpropertiesingadoliniumfunctionalizedcarbonnanotubesupramolecularcomplex