Zeitschrift für Physik B Condensed Matter

, Volume 90, Issue 3, pp 289–296

Magnetic properties of thin epitaxial Gd films on Nb

  • U. Paschen
  • C. Sürgers
  • H. v. Löhneysen
Article

Abstract

We investigated the magnetic properties of Gd films by magnetization measurements with the transverse magnetooptic Kerr effect in the temperature range from 2 to 295 K and for magnetic field up to 0.3 T. The thicknessdGd of the Gd films was varied between 11 and 1000 Å. For thick films (dGd≧500 Å) the form of the hysteresis curves and especially the nonmonotonic temperature dependence of remanence and coercivity can be qualitatively reproduced with a simple model employing theT dependence of the easy-axis direction. TheT dependence of the saturation magnetizationMs of the thick films (dGd>=150 Å) strongly resembles the behavior of bulk crystals, whereas for the thinnest filmsMs approximately depends linearly onT up to the Curie temperatureTC. The thickness dependence ofTC follows approximately a power law with an exponent λ≈1.6 close to the theoretical value.

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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • U. Paschen
    • 1
  • C. Sürgers
    • 1
  • H. v. Löhneysen
    • 1
  1. 1.Physikalisches InstitutUniversität KarlsruheKarlsruheGermany

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