Quantitative investigation of FeMn-based spin-valves by rotating field magnetoresistance measurements

Amitesh Paul, Matthias Buchmeier, Daniel E. Bürgler, Peter Grünberg

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We measure the magnetoresistance of Ta/NiFe/FeMn/NiFe/Co(tCo)/Cu/Co(tCo)/ NiFe spin-valves as a function of field strength and direction. The exchange bias HEB and the giant magnetoresistance depend on the Co thickness tCo, and the resistance shows rotational hysteresis when the external field is close to compensating HEB. A single-domain model reproduces the angular dependence of the magnetoresistance in regions without hysteresis, yields HEB values in agreement with MOKE, and allows one to precisely determine the interlayer coupling and uniaxial anisotropies although they are much weaker than HEB.

Original languageEnglish
Pages (from-to)258-261
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume286
Issue numberSPEC. ISS.
DOIs
StatePublished - Feb 2005
Externally publishedYes

Keywords

  • Exchange bias
  • Rotational hysteresis
  • Spin-valve

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