Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 55: Thin Films: Magnetic Anisotropy
MA 55.6: Vortrag
Donnerstag, 23. März 2017, 16:30–16:45, HSZ 101
Magnetic characterization of the nanolaminated Mn2GaC MAX phase — •Iuliia Novoselova1, Ruslan Salikhov1, Arni S. Ingason2, Johanna Rosen2, Ulf Wiedwald1, and Michael Farle1,3 — 1Faculty of Physics and CENIDE, University Duisburg-Essen, Duisburg, Germany — 2Department of Physics, Linköping University, Linköping, Sweden — 3Center for Functionalized Magnetic Materials, Immanuel Kant Baltic Federal University, Kaliningrad, Russia
We report on the magnetic properties of the new magnetic material Mn2GaC MAX phase [1]. MAX phases are atomically laminated compounds composed of early transition metals M, A - group elements and X is C or N. The crystal structure of MAX phases is hexagonal with M-X-M atomic layers stacking in the c-direction with the A-element as a spacer [2]. Mn2GaC has been synthesized as a epitaxial film containing Mn as an exclusive M element. First principles calculations suggest that the spins in a Mn-C-Mn trilayer are ferromagnetically ordered, however, the antiferromagnetic (AFM) and ferromagnetic (FM) spin alignments in Mn-Ga-Mn chains are competitive [2]. This competition leads to a rich magnetic phase diagram and structural changes linking to temperature-dependent magnetic order and anisotropy [2]. In-plane alignment of magnetic moments caused by the film shape anisotropy below 240 K has been confirmed using ferromagnetic resonance (FMR). Magnetometry measurements reveal hysteretic behavior with the magnetic moment of 1.7 µB per Mn atom at saturation. Work supported by DFG, SA 3095/2-1. [1] A. S. Ingason et al., MRL, 2, 89 (2014). [2] A. S. Ingason et al., J. Phys.: Cond. Mat., 28, 433003 (2016).