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  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. (2018). Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex. Scientific Reports, 8: 8057, pp. 1-9. doi:10.1038/s41598-018-26428-y.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-6E9C-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-6E9E-3
Genre: Journal Article

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Ncube, S.1, Author
Coleman, C.1, Author
Strydom, A.2, Author              
Flahaut, E.1, Author
de Sousa, A.1, Author
Bhattacharyya, S.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 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 mu(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.

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Language(s): eng - English
 Dates: 2018-05-232018-05-23
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
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Title: Scientific Reports
  Abbreviation : Sci. Rep.
Source Genre: Journal
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Publ. Info: London, UK : Nature Publishing Group
Pages: - Volume / Issue: 8 Sequence Number: 8057 Start / End Page: 1 - 9 Identifier: ISSN: 2045-2322
CoNE: /journals/resource/2045-2322