Coulomb staircase and tunnel magnetoresistance in nanowire-shaped granular films

K. Yakushiji, M. Matsuura, S. Mitani, K. Takanashi, H. Fujimori

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Spin-dependent single-electron tunneling properties have been studied in nanostructured samples consisting of nonmagnetic electrodes with a nanogap and (Co-Pt)-Al-O granular films. The granular films were formed into a nanowire shape by electron-beam lithography and Ar ion milling in order to restrict current channels bridging between electrodes. Clear Coulomb staircases have successfully been observed due to the sufficient restriction of current channels in a granular nanowire. Tunnel magnetoresistance as a function of bias voltage shows oscillatory behavior with sign change, suggesting spin-dependent single-electron tunneling with spin accumulation in Co-Pt nanoparticles.

本文言語English
ページ(範囲)e355-e358
ジャーナルJournal of Magnetism and Magnetic Materials
303
2 SPEC. ISS.
DOI
出版ステータスPublished - 2006 8月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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