The effect of interfacial regions on the giant magnetoresistance in as-grown and annealed Fe/Cr MLFs

E. M. Ho, A. K. Petford-Long*, A. Cerezo

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The influence of microstructure, in particular at the Fe/Cr interfaces on the giant magnetoresistance of both as-grown and annealed Fe/Cr multilayer films (MLFs) has been studied. The giant magnetoresistance varies with the spin-dependent resistivity, but the spin-independent resistivity was found to have a much greater effect on the magnitude of the giant magnetoresistance. A simple model was devised to determine the thickness tmixed of the interfacial region across which the composition changed from pure Fe to pure Cr. The morphology of the interfaces was found to have a large influence on the magnitude of the giant magnetoresistance, and for a very diffused interface i.e. a large tmixed, the giant magnetoresistance effect was suppressed. The optimum annealing condition was at a temperature of 300°C for 1 h, with changes in giant magnetoresistance being largely due to a decrease in the spin-independent resistivity upon annealing.

Original languageEnglish (US)
Pages (from-to)431-442
Number of pages12
JournalJournal of Magnetism and Magnetic Materials
Volume192
Issue number3
DOIs
StatePublished - Mar 2 1999

Keywords

  • 73.50.J
  • 75.70
  • 75.70.P
  • Electron microscopy
  • GMR
  • Interfacial mixing
  • Multilayer films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'The effect of interfacial regions on the giant magnetoresistance in as-grown and annealed Fe/Cr MLFs'. Together they form a unique fingerprint.

  • Cite this