Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 17: Poster Session I

MA 17.36: Poster

Dienstag, 8. März 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).