Study on spin dependent tunneling and Coulomb blockade in granular systems with restricted tunneling paths

S. Mitani, Koki Takanashi, K. Yakushiji, J. Chiba, H. Fujimori

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We describe the microfabrication process of a granular nanobridge structure consisting of electrodes separated by a nanometer-sized gap in which a thin insulating Co-Al-O granular film is filled, and discuss the observed Coulomb blockade with a clear threshold voltage (Vth) and the enhanced tunnel magnetoresistance of about 30% at a voltage slightly above Vth. Recent results of our scanning tunneling microscopy studies to clarify the topographic features and single electron tunneling phenomena on the surface of Co-Al-O granular films are also presented.

Original languageEnglish
Pages (from-to)120-125
Number of pages6
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume84
Issue number1-2
DOIs
Publication statusPublished - 2001 Jun 5

Keywords

  • Coulomb blockade
  • Focused ion beam etching
  • Granular film
  • Scanning tunneling microscopy
  • Single electron tunneling
  • Tunnel magnetoresistance

ASJC Scopus subject areas

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

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