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Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 27: Magnetic Thin Films II of 2

MA 27.3: Vortrag

Mittwoch, 13. März 2013, 15:30–15:45, H3

Longitudinal transport properties of Fe films on GaAs(001) — •S Wimmer1, S Bornemann1, D Ködderitzsch1, J Minár1, T Hupfauer2, D Weiss2, and H Ebert11Department Chemie, Ludwig-Maximilians-Universität München — 2Department Physik, Universität Regensburg

We have applied the fully relativistic spin-polarized Korringa-Kohn-Rostoker method to investigate the longitudinal transport properties of Fe layers on GaAs(001) substrates. Our theoretical approach is based on the linear response Kubo formalism that allows to introduce a layer-resolved conductivity σIJ for two-dimensional systems [1] and that has been extended to the fully relativistic case. For the Fen/GaAs(001) metal/semiconductor surface system our results qualitatively reproduce the experimentally observed in-plane anisotropy (IPA) of the resistivity which is caused by the the low symmetry of the underlying surface. Our results demonstrate in particular that the anisotropic magnetoresistance (AMR) as well as the surface induced IPA are sensitive to the substrate termination and thickness of the Fe overlayer.
[1] W.H. Butler, et al. Phys. Rev. B 52, 13399 (1995)

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