Experimental and simulation study to identify current-confined path in Cu-Al space layer for CPP-GMR spin-valve applications

Joon Young Soh, Young-geun Kim, M. Doi, M. Sahashi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

To understand the mechanism of current-confined-path formation for the current-perpendicular-to-plane type of giant magnetoresistive devices, we have investigated the evolution of an A1 monolayer on the Cu (111) surface both by in situ scanning tunneling microscopy and by molecular dynamics simulation. Ultrathin A1 nano-clusters were formed on the plateaus and step (or plateau) edges of the Cu surface in the as-deposited state. Upon annealing at 300 ° C, A1 atoms migrated toward the step edges by surface diffusion. As a consequence, nanometer-sized Cu channels not covered by A1 clusters can be formed. These channels could serve as current-confined paths if subsequent mild A1 oxidation is provided.

Original languageEnglish
Pages (from-to)2633-2635
Number of pages3
JournalIEEE Transactions on Magnetics
Volume42
Issue number10
DOIs
Publication statusPublished - 2006 Jan 1

Keywords

  • Cu-Al
  • current-perpendicular-to-plane giant magnetoresistance (CPP-GMR)
  • molecular dynamics
  • STM

ASJC Scopus subject areas

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

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