Size effects on characteristic magnetic fields of a spin-valve multilayer by computer simulation

S. H. Lim, S. H. Han, K. H. Shin, H. J. Kim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The change in characteristic magnetic fields of a spin-valve multilayer is investigated as a function of the size by computer simulation. The spin-valve modeled in this work is IrMn (9 nm)/CoFe (4 nm)/Cu (2.6 nm)/CoFe (2 nm)/NiFe (6 nm). The spin-valve dimensions are varied widely from 20 mm×10 mm to 0.5 μm×0.25 μm, but the aspect ratio defined by the ratio of the length to the width is fixed at 2.0. The magnetostatic interactions begin to affect the magnetic properties substantially at a spin-valve length of 5 μm, and, at a length of 1 μm, they become even more dominant. The main consequences of the magnetostatic interactions are a significant increase of the coercivity and a very large shift of the bias field in both the pinned and free layers. It is shown that these changes can be explained by two separate contributions to the total magnetostatic interactions: the coercivity change by the self-demagnetizing field and the change of the bias field by the interlayer magnetostatic interaction field.

Original languageEnglish
Pages (from-to)192-198
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume223
Issue number2
DOIs
Publication statusPublished - 2001 Jan 11

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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