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Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 46: Spin: Transport, Orbitronics and Hall Effects I

MA 46.13: Talk

Thursday, March 19, 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, 31Institute 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).

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