SKM 2021 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 3: Posters Magnetism I
MA 3.10: Poster
Montag, 27. September 2021, 13:30–16:30, P
Growth, structure, and magnetic properties of artificially layered NiMn in contact to ferromagnetic Co on Cu3Au(001) — •Tauqir Shinwari1, Ismet Gelen1, Melek Villanueva1, Ivar Kumberg1, Yasser A. Shokr1,2, and Wolfgang Kuch1 — 1Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 2Faculty of Science, Department of Physics, Helwan University, 17119 Cairo, Egypt
Single-crystalline artificially layered [Ni/Mn] antiferromagnetic films with 1 atomic monolayer (ML) of Ni and 1, 2, or 3 ML of Mn have been deposited under ultrahigh-vacuum conditions on Cu3Au(001) and covered by ferromagnetic Co layers. Their structural and magnetic properties are characterized by low-energy electron diffraction (LEED) and magneto-optical Kerr effect (MOKE), respectively, and compared with disordered NixMn100−x alloy films with the same Ni/Mn ratio and the same film thickness. We find from LEED I(V) curves that the perpendicular interatomic lattice distance is decreased by 2% in the artificially layered [Ni/Mn] samples in comparison to the disordered NixMn100−x alloy films. This change in the structure causes higher coercivity, exchange bias, and stronger exchange coupling in artificially layered [Ni/Mn] samples compared to disordered NixMn100−x alloy films.