Magnetic switching properties of GMR spin-valves using SyAF free layers

Takayuki Nozaki, Shinya Abe, Nobuki Tezuka, Koichiro Inomata, Satoshi Sugimoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

GMR spin-valve type multilayers using a synthetic antiferromagnets (SyAF) free layers consisting of Co90Fe10 (t1)/Ru(d) / Co90Fe10 (t2) were deposited on a SiO2/Si substrate by using an ultrahigh vacuum magnetron sputtering system and a metal mask. Giant magnetoresistance curves of these multilyers exhibited two types of curves (normal and inverse like type), depending on the magnitude relation of t1 and t2. The magnetization switching field of SyAF free layers was independent of the Ru thickness (d), suggesting that the switching field is independent of the magnitude of the antiferromagnetic interlayer exchange coupling, and was proportional to (t1 + t2)/Δt, which is in good agreement with the coherent rotation model with perfect antiparallel alignment during magnetization reversal of the SyAF.

Original languageEnglish
Pages (from-to)1078-1082
Number of pages5
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume66
Issue number11
DOIs
Publication statusPublished - 2002 Nov

Keywords

  • Giant magnetoresistance
  • Magnetic random access memory
  • Synthetic antiferromagnets

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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