Coulomb staircase and tunnel magnetoresistance in nanowire-shaped granular films

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)e355-e358
JournalJournal of Magnetism and Magnetic Materials
Volume303
Issue number2 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Aug

Keywords

  • Coulomb blockade
  • Insulating granular system
  • Nanogap
  • Single-electron tunneling
  • Spin-dependent tunneling
  • Tunnel magnetoresistance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Coulomb staircase and tunnel magnetoresistance in nanowire-shaped granular films'. Together they form a unique fingerprint.

  • Cite this