Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Magnetic Materials III
MA 19.3: Vortrag
Dienstag, 8. März 2016, 12:00–12:15, H31
Magnetic anisotropy in MAX Phases — •Ruslan Salikhov1, Ulf Wiedwald1, Arni S. Ingason2, Johanna Rosen2, and Michael Farle1 — 1University Duisburg-Essen, Duisburg, Germany — 2Linköping University, Linköping, Sweden
MAX phases (Mn+1AXn, where n = 1, 2, or 3) are ternary compounds consisting of an early transition metal M (including Mn), an A-group element A, and either C or N, denoted X. MAX phases have attracted considerable interest due to unique material properties combining properties usually associated with metals (electrically and thermally conductive) and ceramics (lightweight, stiff and resistive against oxidation) [1]. The crystal structure of MAX phases is hexagonal with repeated M-X-M (quasi 2D) atomic layers stacking in the c-direction with the A-element as a spacer. The recently discovered magnetic MAX phases (Cr0.5Mn0.5)2GaC and (Cr0.6Mn0.4)2GeC [2, 3] were prepared as epitaxial films and studied by ferromagnetic resonance (FMR) and SQUID magnetometry. We find that the (Cr0.5Mn0.5)2GaC film has a negligibly small magnetocrystalline anisotropy energy density (MAE) and the spectroscopic splitting factor is 2.00 +- 0.02 [4]. The (Cr0.6Mn0.4)2GeC film, however, shows a high MAE of 0.1 MJ/m3 at T = 100 K with the easy axis parallel to the c axis (perpendicular to the film plane).
[1] M. W. Barsoum, Prog. Solid State Chem. 28, 201, (2000).
[2] A. Petruhins et al., Journal of Materials Science 50, 4495 (2015).
[3] A. S. Ingason et al., Phys Rev Lett. 110, 195502 (2013).
[4] R. Salikhov et al., Mater. Res. Lett. 3, 156 (2015).