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Dresden 2006 – scientific programme

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MA: Magnetismus

MA 29: Magnetic Thin Films IV

MA 29.6: Talk

Thursday, March 30, 2006, 16:30–16:45, HSZ 03

Effect of hydrogen on the magnetism in Fe/V superlattices — •Arndt Remhof1, Gregor Nowak1, Alexei Nefedov1, Matts Björk2, Martin Pärnaste2, Björgvin Hjörvarsson2, and Hartmut Zabel11Institut für Experimentalphysik / Festkörperphysik, Ruhr-Universität Bochum, Germany — 2Department of Physics, Uppsala University, Sweden

We report on the increase of the Fe magnetic moment within Fe/V superlattices upon H-uptake. At the Fe/V interface of pristine, ferromagnetically coupled Fe/V superlattices the V atoms acquire a magnetic moment, antiparallel aligned to the Fe moments [1]. Upon hydrogen loading the saturation magnetization was found to increase [2]. We employed element specific X-ray resonant magnetic scattering to investigate the response of the Fe and the V moments separately. An epitaxial [Fe(2ML)/V(16ML)]×30 superlattice was employed, ensuring a high number of V neighbors of each Fe atom. The soft x-ray measurements were carried out using the ALICE diffractometer at BESSY II in Berlin, Germany. The data clearly show a strong increase of the Fe moment upon H-loading. No change of the magnetic asymmetry at the V edge could be recognized. Our measurements confirm nicely the theoretical model by Uzdin et al. [3], predicting an increase of the Fe moment and a stable V moment in H loaded Fe/V superlattices.
This project founded by the DFG under contract no. RE 2203/1-1.
[1] A. Scherz et. al. Phys. Rev. B 68, 140401(R) (2003).
[2] D. Labergerie, et al. J. Magn. Magn. Mater. 225, 373 (2001).
[3] V. Uzdin, et al., Phys. Rev. B 68, 214407 (2003).

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