Regensburg 2016 – scientific programme
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MA: Fachverband Magnetismus
MA 17: Poster Session I
MA 17.36: Poster
Tuesday, March 8, 2016, 09:30–12:30, Poster B1
Anisotropic magneto-optical properties of ultrathin Fe/GaAs(001) layers — •Martin Buchner1, Sebastian Putz1, Stefan Günther2, Matthias Kronseder1, Dieter Schuh1, Dominique Bougeard1, Jaroslav Fabian1, and Christian Back1 — 1Department of Physics, Regensburg University, 93053 Regensburg, Germany — 2Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
Spin-orbit coupling plays an important role in solids lacking space inversion symmetry. It has been shown that the resulting interfacial spin-orbit fields at the Fe/GaAs(001) interface lead to several anisotropic electronic properties like tunneling anisotropic magnetoresistance [1] as well as lateral anisotropic magnetotransport phenomena [2].
Recently, it has been proposed that the anisotropic interfacial spin-orbit fields also should affect the optical properties of the Fe/GaAs(001) heterostructure [3]. Here, we report the observation of anisotropic polar magneto-optical Kerr effect in epitaxial Fe/GaAs(001). We observe a clear twofold symmetry of the Kerr rotation angle depending on the orientation of the linear polarization of the probing laser beam with respect to the crystallographic directions of the sample.
[1] J. Moser et al., Phys. Rev. Lett. 99, 056601 (2007).
[2] T. Hupfauer et al., Nat. Commun. 6, 7374 (2015).
[3] S. Putz et al., Phys. Rev. B 90, 045315 (2014).