Magnetic properties of thin epitaxial Gd films on Nb
- Cite this article as:
- Paschen, U., Sürgers, C. & Löhneysen, H.. Z. Physik B - Condensed Matter (1993) 90: 289. doi:10.1007/BF01433050
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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.