Hysteresis and interaction between the magnetic layers in spin valves

Koichi Nishioka, Sunita Gangopadhyay, Hideo Fujiwara, Martin Parker

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Spin valve characteristics have been investigated in the samples of glass /Ta(X Å) /NiFe(Yf Å) /Cu(Z Å) /NiFe(Yp Å) /FeMn(150 Å)/Ta(50 Å) with various X, Yf, Yp and Z values. The pinning field of FeMn increases and saturates with increasing X, Yf and Yp, followed by an improvement of (111) texturing of the NiFe /Cu /NiFe/ FeMn layers. GMR vs. field curves in the easy magnetization direction were studied for various Cu thicknesses, Z. With decreasing Z, the coercivity of the free layer begins to decrease, followed by a reduction of the GMR effect which finally disappears. This change can be explained semi-quantitatively by theoritical analysis which assums some dispersion in the direction of the pinning field.

Original languageEnglish
Pages (from-to)3949-3951
Number of pages3
JournalIEEE Transactions on Magnetics
Volume31
Issue number6
DOIs
Publication statusPublished - 1995 Nov
Externally publishedYes

ASJC Scopus subject areas

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

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