Europhys. Lett, 48 (6), pp. 692-698 (1999)
Proximity effect in exchange-coupled superlattices
T. Schmitte, A. Schreyer, V. Leiner, R. Siebrecht
K. Theis-Bröhl and H. Zabel
Institut für Experimentalphysik/Festkörperphysik, Ruhr-Universität Bochum - Germany
(received 5 July 1999; accepted in final form 19 October 1999)
PACS. 75.70-i - Magnetic films and multilayers.
PACS. 75.30Fv - Spin density waves.
PACS. 75.25+z - Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron source X-ray scattering, etc.).
Using temperature-dependent measurements of the magneto-optical Kerr effect (MOKE) we map out a magnetic phase diagram of Fe/Cr(001) superlattices with Cr-thicknesses between 10 to 45 Å in a temperature range from 10 to 700 K. By comparison with neutron scattering results, we demonstrate the strong correlation between different magnetic phases of the Cr interlayers and the coupling between the Fe layers. We find an enhancement of the Cr Neél temperature as we reduce the Cr thicknesses, indicating a strong proximity effect between the Fe and Cr layers.
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