Magnetic anisotropy studies in Ce/Fe and U/Fe multilayers

M. F. Thomas, G. S. Case, J. Bland, C. A. Lucas, A. Herring, W. G. Stirling, P. Boni, S. Tixier, R. C.C. Ward, M. R. Wells, S. Langridge

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Multilayer samples of Ce/Fe, fabricated by sputtering and characterized by X-ray diffraction and reflectivity were studied by polarized neutron reflectivity and Mössbauer spectroscopy. Corresponding studies on sputtered U/Fe multilayers have been initiated. In Fe/Ce a paramagnetic phase, identified as amorphous Fe was observed at Fe thicknesses below 20 Å. Perpendicular magnetic anisotropy was observed for Fe thicknesses below 17 Å and studies in applied fields enabled magnetic anisotropies to be evaluated for Fe thicknesses up to 40 Å. The Ce/Fe interface anisotropy was evaluated as Ks = (0.98 ± 0.15) × 10-3 Jm-2, among the largest values reported. Neutron reflectivity results did not observe magnetic moments on Ce layers. Preliminary measurements on U/Fe multilayers have not observed induced moments on the U layer.

Original languageEnglish
Pages (from-to)537-543
Number of pages7
JournalPhysica Status Solidi (A) Applied Research
Issue number2
StatePublished - Feb 2002
Externally publishedYes


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