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MA: Fachverband Magnetismus
MA 46: Spin: Transport, Orbitronics and Hall Effects I
MA 46.13: Vortrag
Donnerstag, 19. März 2020, 12:45–13:00, HSZ 403
Structural, electrical transport and magnetization dynamic properties of epitaxial Mn3Ir/Ni3Fe heterostructures — •Sri Sai Phani Kanth Arekapudi1, Fabian Ganss1, Antje Oelschlägel3, Anna Semisalova3, Sven Stienen3, Kilian Lenz3, Jürgen Lindner1, Manfred Albrecht2, and Olav Hellwig1, 3 — 1Institute of Physics, Technische Universität Chemnitz, 09107 Chemnitz, Germany — 2Institute of Physics, University of Augsburg, Universitätsstraße 1,86159 Augsburg, Germany — 3Institute for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
In spin-orbitronic devices, non-collinear antiferromagnets (AFM) such as Mn3Ir are used as active spin current injection electrodes for an efficient charge to spin current conversion [1]. Here we present a detailed procedure for the preparation of high-quality epitaxial thin films of cubic Mn3Ir (AFM) and Ni3Fe (FM) heterostructures. A comprehensive study of the crystal structure is performed using X-ray diffraction and high-resolution TEM imaging. Dynamic magnetic excitation studies of Mn3Ir/Ni3Fe heterostructures confirm the strong dependence of Gilbert damping and interfacial spin structure on the antiferromagnetic film thickness. Furthermore, we also reveal the role of AFM/FM interface spin-current transparency, which is pivotal for the spin Hall effect (SHE). [1] W. Zhang et al., Giant facet-dependent spin-orbit torque and spin Hall conductivity in the triangular antiferromagnet IrMn3. Sci. Adv. 2, e1600759 (2016).