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Nickel clusters embedded in carbon nanotubes as high performance magnets

Authors/others:Shiozawa, HidetsuguBriones Leon, Juan AntonioDomanov, OlegZechner, GeorgSato, Yuta (AIST, National Institute of Advanced Industrial Science & Technology (AIST), Nanomat Res Inst) Suenaga, Kazu (AIST, National Institute of Advanced Industrial Science & Technology (AIST), Nanomat Res Inst) Saito, Takeshi (AIST, National Institute of Advanced Industrial Science & Technology (AIST), Nanomat Res Inst) Eisterer, Michael (Technische Universität Wien) Weschke, Eugen (Helmholtz-Zentrum Berlin für Materialien und Energie) Lang, WolfgangPeterlik, HerwigPichler, Thomas
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.
Language:English
Number of pages:9
Date of publication:13.10.2015
Journal title:Scientific Reports
Volume:5
Links:http://phaidra.univie.ac.at/o:454082
Digital Object Identifier (DOI):http://dx.doi.org/10.1038/srep15033
Publication Type:Article
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