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Nickel clusters embedded in carbon nanotubes as high performance magnets.

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.

SUBMITTER: Shiozawa H

PROVIDER: S-EPMC4602218 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature

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Nickel clusters embedded in carbon nanotubes as high performance magnets.

Shiozawa Hidetsugu H Briones-Leon Antonio A Domanov Oleg O Zechner Georg G Sato Yuta Y Suenaga Kazu K Saito Takeshi T Eisterer Michael M Weschke Eugen E Lang Wolfgang W Peterlik Herwig H Pichler Thomas T

Scientific reports 20151013

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 inte ...[more]

PMID: 26459370

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