Direct observation of the interlayer exchange coupling mechanism in a magnetic [ ] multilayerJ. Voigt1, E. Kentzinger1, U. Rücker1, D. Wermeille2, D. Hupfeld1, W. Schweika1, W. Schmidt1, 3 and Th. Brückel1
1 Institut für Festkörperforschung, Forschungszentrum Jülich - 52425 Jülich, Germany
2 Ames Laboratory-US DOE and Department of Physics and Astronomy Iowa State University - Ames, IO 50011, USA
3 Institute Laue-Langevin - BP 156, F-38042 Grenoble Cedex 9, France
(Received 15 October 2003; accepted 3 December 2003)
Proximity effects in an [ ] superlattice lead to the formation of new magnetic phases. Modulated magnetic order, expected for pure , and ferromagnetic order, expected for pure , coexist at low temperatures. Employing X-ray resonance exchange scattering, we could probe directly the respective spin polarisations of the conduction band electrons, providing a mechanism for the interlayer coupling. The different anisotropies of and compete with this tendency to long-range magnetic order, leading to substantial thermal-hysteresis effects.
75.75.+a - Magnetic properties of nanostructures.
75.25.+z - Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.).
61.18.Fs - Magnetic resonance techniques; Mössbauer spectroscopy.
© EDP Sciences 2004