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Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex

Ncube, Siphephile and Coleman, Chistopher and Strydom, Andrew and Flahaut, Emmanuel and de Sousa, Alvaro S. and Bhattacharyya, Somnath Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex. (2018) Scientific Reports, 8 (8057). 1-9. ISSN 2045-2322

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Official URL: http://doi.org/10.1038/s41598-018-26428-y

Abstract

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 μB and nonsuperparamagnetic 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.

Item Type:Article
Additional Information:Thanks to Nature Publishing Group editor. The original PDF of the article can be found at https://www.nature.com/articles/s41598-018-26428-y
HAL Id:hal-01812134
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Max-Planck-Institut für Chemische Physik Fester Stoffe - CPFS (GERMANY)
Other partners > University of Johannesburg - UJ (SOUTH AFRICA)
Other partners > University of the Witwatersrand - WITS (SOUTH AFRICA)
Laboratory name:
Funders:
NRF (SA) - South African National Research Foundation
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Deposited By: cirimat webmestre
Deposited On:11 Jun 2018 09:42

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