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Abstract

The temperature dependent magnetic properties of room temperature growth face centred cubic (fcc) iron films on Cu(001) were investigated by means of spin polarized appearance potential spectroscopy. The Curie temperatures are strongly reduced in relation to the bulk value of ferromagnetic body centred cubic (bbc) iron and show an unusual dependence on coverage. In addition, the shape of the magnetization curves exhibits distinct differences in various regions of film thickness. While the thinnest ferromagnetic films (2 and 2.5 monolayers) represent almost ideal 2-dimensional anisotropic Heisenberg ferromagnets, coverages between 6 and 8 monolayers exhibit linear and, without remagnetizing the sample, irreversible temperature dependences approaching the magnetic phase transition. The magnetic peculiarities of metastable fcc iron are attributed to the critical influence of structural properties.

Additional information

Authors: DETZEL T, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);VONBANK M, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);DONATH M, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);MEMMEL N, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);DOSE V, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Article: Journal of Magnetism and Magnetic Materials, Vol. 152 (1996) pp. 287-292
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