Enhanced spin accumulation and novel magnetotransport in nanoparticles

Kay Yakushiji, Franck Ernult, Hiroshi Imamura, Kazutaka Yamane, Seiji Mitani, Koki Takanashi, Saburo Takahashi, Sadamichi Maekawa, Hiroyasu Fujimori

Research output: Contribution to journalReview articlepeer-review

156 Citations (Scopus)

Abstract

The precise magnetotransport measurements in the single electron tunnelling regime are performed by preparing appropriate microfabricated devices containing cobalt nanoparticles. An experimental evidence for characteristic features of spin accumulation in magnetic nanoparticles are also provided. The spin-flip mechanisms due to the interaction with magnons in a nanoparticles are also suppressed because of the size quantization of magnon excitations. The magnetoresistance behavior shows that the spin-relaxation time in nanoparticles is highly enhanced in comparison with that in the bulk.

Original languageEnglish
Pages (from-to)57-61
Number of pages5
JournalNature Materials
Volume4
Issue number1
DOIs
Publication statusPublished - 2005 Jan

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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