Magnetoresistance oscillations in double ferromagnetic tunnel junctions with layered ferromagnetic nanoparticles

K. Nakajima, Y. Saito, S. Nakamura, K. Inomata

Research output: Contribution to journalConference articlepeer-review

22 Citations (Scopus)

Abstract

Tunnel magnetoresistance in double tunnel junctions with layered ferromagnetic nanoparticles was investigated. The sample comprises two ferromagnetic electrodes (CoFe/Fe) separated by an Al2O3 insulating layer in which layered Co80Pt20 nanoparticles are embedded. The nanopartices are ellipsoidal with an average diameter of 3.7 nm, and composes a well-defined layer. At 10 K, we observed magnetoresistance oscillation with respect to the bias voltage. The observed TMR oscillation, with a period of 1.6 mV, accompanied oscillations of the conductance. We consider that the conductance oscillation may originate from the single electron charging effect.

Original languageEnglish
Pages (from-to)2806-2808
Number of pages3
JournalIEEE Transactions on Magnetics
Volume36
Issue number5 I
DOIs
Publication statusPublished - 2000 Sep 1
Externally publishedYes
Event2000 International Magnetics Conference (INTERMAG 2000) - Toronto, Ont, Canada
Duration: 2000 Apr 92000 Apr 12

Keywords

  • Double tunnel junction
  • Nanoparticle
  • Single electron tunneling effect
  • Tunnel magnetoresistance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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