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Ultrathin Metal Films By Design: Exploiting The Close Correlation Between Structure And Magnetism

Author

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  • M. WUTTIG

    (Institut für Grenzflächenforschung und Vakuumphysik, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany)

  • B. FELDMANN

    (Institut für Grenzflächenforschung und Vakuumphysik, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany)

Abstract

To design ultrathin metal films with desired properties, it is necessary to understand the close correlation between film structure and film properties. In this paper several examples of the relationship between the magnetism and the structure of thin metallic films are presented. It is demonstrated that for iron films on Cu(100) andCu3Au(100) and for MnCu surface alloys, unusual film structures are often accompanied by unusual magnetic properties. While two fcc phases, which differ in their crystallographic and magnetic states, have been stabilized on Cu(100) depending upon film thickness, no fcc modification is observed onCu3Au(100). This can be understood qualitatively if the different contributions to the total energy of the film are considered. For the weak magnets Mn and Fe studied here, this points towards a pronounced contribution of the surface to stabilizing unusual magnetic phases. This is demonstrated even quantitatively for theCu(100) c(2×2)Mnphase, where an unusual surface-layer corrugation is accompanied by a large magnetic moment. An improved understanding of the energies that govern the correlation between structural and magnetic properties should widen the opportunities for designing ultrathin films with desired magnetic characteristics.

Suggested Citation

  • M. Wuttig & B. Feldmann, 1996. "Ultrathin Metal Films By Design: Exploiting The Close Correlation Between Structure And Magnetism," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(03), pages 1473-1486.
  • Handle: RePEc:wsi:srlxxx:v:03:y:1996:i:03:n:s0218625x96002485
    DOI: 10.1142/S0218625X96002485
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