Berlin 2024 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MA: Fachverband Magnetismus
MA 47: Poster III
MA 47.31: Poster
Thursday, March 21, 2024, 15:00–18:00, Poster D
Magneto-optical investigation of epitaxially grown Mn2Au on Au capped Nb(100) — •Jendrik Gördes1, Tauqir Shinwari1, Tingwei Li1, Arne Vereijken2, Christian Janzen2, Arno Ehresmann2, and Wolfgang Kuch1 — 1Institut für Experimentalphysik, Freie Universität Berlin, Berlin, Germany — 2Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Kassel, Germany
Antiferromagnetic materials are promising candidates for future data storage devices due to the absence of magnetic stray fields and spin dynamics in the THz range. Mn2Au stands out as a particularly promising material, capable of electrical switching [1] through Néel spin-orbit torque without the need for an additional heavy metal layer. Here, we report on the co-evaporation of Mn2Au and Fe on a Nb(100) substrate capped by a pseudomorphic monolayer of Au via flash annealing. This preserves the long-range crystallographic order and periodicity of Nb [2] while preventing surface oxidation. Layer-by-layer growth of Mn2Au is monitored in-situ via medium-energy electron diffraction (MEED). Structural analysis is carried out by Auger electron spectroscopy (AES) and low-energy electron diffraction (LEED). After field-cooling, dynamics of the exchange-bias-shifted magnetization loop are studied by Kerr magnetometry and microscopy. Our results highlight the feasibility to expand the range of available substrates to metal single crystals for the growth of Mn2Au layers.
[1] J. Zelezny, H. Gao, K. Vyborny et al., Phys. Rev. Lett. 113 (2014)
[2] E. Hüger, H. Wormeester, K. Osuch, Surf. Sci. 580 (2005)
Keywords: Antiferromagnet; Mn2Au; Single Crystal; Exchange Bias; Kerr Microscopy