Anisotropic Polar Magneto-Optic Kerr Effect of Ultrathin Fe/GaAs(001) Layers due to Interfacial Spin-Orbit Interaction

Buchner, M. and Hoegl, P. and Putz, S. and Gmitra, M. and Guenther, S. and Schoen, M. A. W. and Kronseder, M. and Schuh, D. and Bougeard, D. and Fabian, J. and Back, C. H. (2016) Anisotropic Polar Magneto-Optic Kerr Effect of Ultrathin Fe/GaAs(001) Layers due to Interfacial Spin-Orbit Interaction. PHYSICAL REVIEW LETTERS, 117 (15): 157202. ISSN 0031-9007, 1079-7114

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Abstract

We report the observation of the anisotropic polar magneto-optical Kerr effect in thin layers of epitaxial Fe/GaAs(001) at room temperature. 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 is detected for ultrathin magnetic films saturated out of the film plane. The amplitude of the anisotropy decreases with increasing Fe film thickness, suggesting that the interfacial region is the origin of the anisotropy. The twofold symmetry is fully reproduced by model calculations based on an interference of interfacial Bychkov-Rashba and Dresselhaus spin-orbit coupling.

Item Type: Article
Uncontrolled Keywords: EPITAXIAL FE FILMS; MAGNETIC-ANISOTROPY; DOMAIN-WALLS; GAAS(001); VOLUME; TORQUE;
Subjects: 500 Science > 530 Physics
Divisions: Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian
Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back
Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Dominique Bougeard
Depositing User: Dr. Gernot Deinzer
Date Deposited: 24 Apr 2019 10:52
Last Modified: 24 Apr 2019 10:52
URI: https://pred.uni-regensburg.de/id/eprint/4110

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