Berlin 2005 – wissenschaftliches Programm
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MA: Magnetismus
MA 22: Magnetische dünne Schichten IV
MA 22.7: Vortrag
Dienstag, 8. März 2005, 12:00–12:15, TU H1012
Reorientation of spin-density waves in Cr films induced by proximity effects of vanadium — •H. Zabel1, E. Kravtsov1, A. Nefedov1, A. Remhof1, F. Radu1, B. Hjörvarsson2, A. Hoser3, and G.J. McIntyre4 — 1Festkörperphysik, Ruhr-Universität Bochum, D-44780 Bochum, Germany — 2Department of Physics, Uppsala University, Box 530, S-75121 Uppsala, Sweden — 3Institut für Kristallographie, RWTH-Aachen, D-52056 Aachen, Germany — 4Institut Laue-Langevin, F-38042 Grenoble Cedex 9, France
The spin density wave (SDW) magnetism in Cr implies a periodic and usually incommensurate modulation of the magnetization vector in real space. In thin films, the SDW is confined and therefore the spontaneous formation of the SDW due to the Fermi surface nesting competes with hybridization effects of adjacent ferro- or paramagnetic layers, with interfacial structures (order and disorder), and with dimensionality effects (film thickness). We report on neutron scattering studies from proximity effects of neighbouring vanadium layers on the SDW in epitaxial Cr(001) films. We provide direct evidence for long-range effects from the V/Cr interface, leading to changes in the polarization and propagation direction of the SDW in rather thick Cr films. The Néel temperature is found to be affected by boundary conditions for the spin-density waves at V/Cr interfaces. - This work is supported by DFG-SFB 491: Magnetic Heterostructures.