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MA: Fachverband Magnetismus

MA 65: Poster 2

MA 65.28: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-OG1

Magnetocrystalline anisotropy in the nanolaminated magnetic Mn2GaC MAX phase — •Iuliia Novoselova¹, Ruslan Salikhov¹, Arni S. Ingason², Johanna Rosen², Ulf Wiedwald¹, Hongbin Zhang³, and Michael Farle^1,4 — ¹Faculty of Physics, University Duisburg-Essen, Duisburg, Germany — ²Thin Film Physics Division, Department of Physics, Linköping University, Linköping, Sweden — ³Institute of Materials Science, Theory of Magnetic Materials Group, TU Darmstadt, Darmstadt, Germany — ⁴Center for Functionalized Magnetic Materials, IKBFU, Kaliningrad, Russia

MAX phases (M_n+1AX_n, n = 1, 2, etc.) are inherently nanolaminated hexagonal compounds composed of early transition metals M, A-group elements and X refers to C or N. Due to the unique structure these materials share properties usually associated with ceramics and metals [1]. Ternary Mn₂GaC magnetic compounds have been synthesized recently as hetero-epitaxial films containing Mn as the exclusive M-element [2]. Using ferromagnetic resonance (FMR) we have studied magnetic anisotropy in the Mn₂GaC in comparison with (Cr_0.5Mn_0.5)₂GaC MAX phase [3]. We find a significant magnetocrystalline anisotropy energy density of 0.5 MJ/m³ at the temperature below 200 K with the easy axis perpendicular to the c-axis. Such observation can be understood using the perturbation theory based on the first-principles calculations. This work is supported by DFG Grant SA 3095/2-1 and DAAD Programm 57214224. [1] M. W. Barsoum, Prog. Solid State Chem. 28, 201 (2000). [2] A. S. Ingason et al., MRL, 2, 89 (2014). [3] R. Salikhov et al., MRL, 3, 156 (2015).