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Structural analysis of ion irradiated polycrystalline NiFe/FeMn exchange bias systems

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  • S. Blomeier
  • D. McGrouther
  • S. McVitie
  • J. N. Chapman
  • M. C. Weber
  • B. Hillebrands
  • J. Fassbender

Abstract

Structural investigations of the ion irradiated polycrystalline NiFe/FeMn exchange bias bilayer system were carried out by means of transmission electron microscopy. Key structural parameters like average grain size, lattice constant, and texture, as well as their dependence upon ion irradiation were determined. This information was extracted from a detailed analysis of a series of bright field images, dark field images, and diffraction patterns. Furthermore a previously established model was tested which ascribes changes in the magnetic properties upon irradiation with 5 keV He+ ions to the creation of point defects within the antiferromagnetic layer and to the intermixing between the ferromagnetic and antiferromagnetic layers. The obtained results indirectly support this model by excluding a change of the aforementioned structural parameters as a possible source of the observed modifications of the magnetic properties. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Suggested Citation

  • S. Blomeier & D. McGrouther & S. McVitie & J. N. Chapman & M. C. Weber & B. Hillebrands & J. Fassbender, 2005. "Structural analysis of ion irradiated polycrystalline NiFe/FeMn exchange bias systems," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 45(2), pages 213-218, May.
    • Handle: RePEc:spr:eurphb:v:45:y:2005:i:2:p:213-218
    DOI: 10.1140/epjb/e2005-00124-5
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