Nickel clusters embedded in carbon nanotubes as high performance magnets

Autoren:Shiozawa, Hidetsugu; Briones Leon, Juan Antonio; Domanov, Oleg; Zechner, Georg; Sato, 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, Wolfgang; Peterlik, Herwig; Pichler, Thomas
Abstrakt: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.
Anzahl der Seiten:9
Journaltitel:Scientific Reports
Peer reviewed:true
Digital Object Identifier (DOI):