SKM 2021 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 15: Posters Magnetism IV
MA 15.24: Poster
Donnerstag, 30. September 2021, 13:30–16:30, P
High quality antiferromagnetic Mn2Au (001) thin films for spintronics — •S. P. Bommanaboyena1, T. Bergfeldt2, R. Heller3, M. Kläui1, and M. Jourdan1 — 1Institut für Physik, Johannes Gutenberg-Universität, Staudingerweg 7, D-55099 Mainz, Germany — 2Institut für Angewandte Materialien, Karlsruher Institut für Technologie, 76344 Eggenstein-Leopoldshafen, Germany — 3Institut für Ionenstrahlphysik und Materialforschung, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
The recent experimental demomonstration of Néel order manipulation via current induced Néel spin-orbit torques in antiferromagnetic Mn2Au [1] has sparked a huge interest in this compound. We report the preparation of high-quality epitaxial Mn2Au(001) thin films using molecular beam epitaxy and compare them with magnetron sputtered films [2]. Mn and Au were co-evaporated in ultra-high vacuum onto a heated epitaxial Ta(001) buffer layer deposited on an Al2O3 substrate. Structural and morphological characterization of the thin films was carried out using in-situ reflective high energy electron diffraction, X-ray diffraction, X-ray reflectometry and temperature dependent resistance measurements. The films were found to be highly crystalline and smooth with a low defect concentration which is desirable for reduced domain wall pinning and will be useful for next generation antiferromagnetic spintronics devices which require smooth interfaces between the various active layers. [1] S. Yu. Bodnar et al, Nat. Commun. 9, 348 (2018). [2] S. P. Bommanaboyena et al, J. Appl. Phys. 127, 243901 (2020).