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Nickel clusters embedded in carbon nanotubes as high performance magnets

Authors/others:Shiozawa, HidetsuguBriones Leon, Juan AntonioDomanov, OlegZechner, GeorgSato, Yuta (National Institute of Advanced Industrial Science and Technology (AIST)) Suenaga, Kazu (National Institute of Advanced Industrial Science and Technology (AIST)) Saito, Takeshi (National Institute of Advanced Industrial Science and Technology (AIST)) 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.
Number of pages:9
Date of publication:13.10.2015
Journal title:Scientific Reports
Digital Object Identifier (DOI):https://doi.org/10.1038/srep15033
Publication Type:Article
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