Nickel clusters embedded in carbon nanotubes as high performance magnets

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 o...

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Published inScientific reports Vol. 5; no. 1; p. 15033
Main Authors Shiozawa, Hidetsugu, Briones-Leon, Antonio, Domanov, Oleg, Zechner, Georg, Sato, Yuta, Suenaga, Kazu, Saito, Takeshi, Eisterer, Michael, Weschke, Eugen, Lang, Wolfgang, Peterlik, Herwig, Pichler, Thomas
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 13.10.2015
Nature Publishing Group
Subjects
140/133
639/301/357/997
639/766/119/997
639/925/357/73
Carbon
Circular dichroism
Humanities and Social Sciences
Interfaces
Localization
multidisciplinary
Nanotechnology
Nanotubes
Nickel
Science
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Summary: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.
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ISSN:2045-2322
2045-2322
DOI:10.1038/srep15033