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AM: Magnetismus

AM 10: Dünne Schichten I

AM 10.11: Talk

Wednesday, March 28, 2001, 16:30–16:45, S 5.2

Hydrogen Induced Change of the Atomic Magnetic Moments in Fe/V-Superlattices — •K. Westerholt¹, D. Labergerie¹, H. Zabel¹, and B. Hjörvarsson² — ¹Experimentalphysik (Festkörperphysik), Ruhr-Universität Bochum, 44780 Bochum, Germany. — ²Royal Institute of Technology, Material Physics, S-10044 Stockholm, Sweden.

We have studied the change of the magnetic saturation magnetization of (Fe/V)-superlattices upon loading with hydrogen using a highly sensitive Faraday balance and in-situ loading with hydrogen. We find that the magnetic saturation moment for all superlattices increases with the hydrogen concentration. For the superlattice with 3 monolayers of Fe and 11 monolayers of V in the unit cell we find the maximum increase, corresponding to a change of the atomic magnetic moment of +0.35 Bohr magneton/Fe-atom. The results are compared to recent band structure calculations in the literature and can be explained by the change of the Fe- and V-magnetic moments at the interfaces caused by the charge transfer from the hydrogen atoms to the Vanadium d-bands.