A microstructural study of annealed Ti/Co/Cu/Co/MnFe/Ti spin-valve films

X. Portier*, A. K. Petford-Long, P. Bayle-Guillemaud, T. C. Anthony, J. A. Brug

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Spin-valve properties are adversely affected by heat treatments and in order to study this effect, microstructural analyses of Ti/Co/Cu/Co/MnFe/Ti spin-valve films annealed at 225 and at 290°C have been performed. Whereas the lower temperature tends to optimize the giant magnetoresistance (GMR) ratio, the higher temperature induces a significant decrease in the GMR ratio (from 7.5% to 5.2%). High resolution electron microscopy studies have explained this result as being due to the formation of a TiCo alloy at the Ti/Co interface and to a decrease in the thickness of the sense layer. No significant modification of either the Co/Cu or the Cu/Co interfaces has been observed.

Original languageEnglish (US)
Pages (from-to)118-120
Number of pages3
JournalApplied Physics Letters
Volume72
Issue number1
DOIs
StatePublished - Dec 1 1998

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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