Berlin 2008 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 41: Poster SYM Hydrogen in Materials: New Developments

MM 41.9: Poster

Thursday, February 28, 2008, 18:00–20:00, Poster B

Remote control of the Fe magnetic moment in magnetic heterostructures — •Arndt Remhof^1,2, 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).