Berlin 2008 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 41: Poster SYM Hydrogen in Materials: New Developments
MM 41.9: Poster
Donnerstag, 28. Februar 2008, 18:00–20:00, Poster B
Remote control of the Fe magnetic moment in magnetic heterostructures — •Arndt Remhof1,2, Gregor Nowak1, Hartmut Zabel1, Matts Björck3, Martin Pärnaste3, Björgvin Hjörvarsson3, and Valery Uzdin4 — 1Department of Physics, Ruhr-Universität, Bochum, Germany — 2Empa, Swiss Federal Laboratories for Materials Research, Dübendorf, Switzerland — 3Department of Physics, Uppsala University, Sweden — 4Saint-Petersburg State University, Russia
In magnetic superlattices with interlayer exchange coupling, not only the coupling strength but also the magnetic moment of the ferromagnetic layer can be altered non-locally by modifying the electronic structure of the non-magnetic spacer layer. Specifically, changes of the electronic structure of the V spacer layers in Fe/V (001) superlattices are seen to affect the adjacent Fe layers. By reversibly loading the V layer with hydrogen, the magnetic moment of Fe increases, whereas the induced magnetic moment in V remains unchanged. The nature of this remote and non-local control of the magnetic moment is connected with a d-electron charge transfer and effective shift of the Fermi level relative to the d-bands of Fe and V, as elucidated on the basis of self-consistent electronic structure calculations [1].
We acknowledge financial support of the DFG
under contract RE 2203-1/1, DFG - RFBR project
06-02-04005, INTAS-NETWORK project (03-51-4778)
and from VR, the Swedish research council.
A. Remhof et al, Europhys. Lett, 79 37003 (2007).