Nickel clusters embedded in carbon nanotubes as high performance magnets

Author(s)
Hidetsugu Shiozawa, Juan Antonio Briones Leon, Oleg Domanov, Georg Zechner, Yuta Sato, Kazu Suenaga, Takeshi Saito, Michael Eisterer, Eugen Weschke, Wolfgang Lang, Herwig Peterlik, Thomas Pichler
Abstract

Ensembles of fcc nickel nanowires have been synthesized with defined mean sizes in the interior of single-wall carbon nanotubes. The method allows the intrinsic nature of single-domain magnets to emerge with large coercivity as their size becomes as small as the exchange length of nickel. By means of X-ray magnetic circular dichroism we probe electronic interactions at nickel-carbon interfaces where nickel exhibit no hysteresis and size-dependent spin magnetic moment. A manifestation of the interacting two subsystems on a bulk scale is traced in the nanotube's magnetoresistance as explained within the framework of weak localization.

Organisation(s)
Electronic Properties of Materials, Dynamics of Condensed Systems, Faculty Center for Nano Structure Research
External organisation(s)
National Institute of Advanced Industrial Science and Technology (AIST), Technische Universität Wien, Helmholtz-Zentrum Berlin für Materialien und Energie
Journal
Scientific Reports
Volume
5
No. of pages
9
ISSN
2045-2322
DOI
https://doi.org/10.1038/srep15033
Publication date
10-2015
Peer reviewed
Yes
Austrian Fields of Science 2012
Materials physics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/nickel-clusters-embedded-in-carbon-nanotubes-as-high-performance-magnets(a336b95f-31f1-4886-a51d-2bec6f251c89).html