Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 53: Magnetic Heuslers, half-metals and oxides

MA 53.11: Vortrag

Freitag, 5. April 2019, 12:15–12:30, H33

Magnetic properties of layered (Cr_0.5Mn_0.5)₂AuC films — •Ruslan Salikhov¹, Chung-Chuan Lai², Quanzheng Tao², Johanna Rosen², Ulf Wiedwald¹, and Michael Farle¹ — ¹University of Duisburg-Essen, Duisburg, Germany — ²Linköping University, Linköping, Sweden

The M_n+1AX_n (n =1,2,3) phases are family of nanolaminated ceramics with more than 170 members discovered so far. Mn-based ternary and quaternary compounds led to a new class of magnetic materials, for example (Cr_0.5Mn_0.5)₂GaC [1] and Mn₂GaC [2]. Most recently the synthesis of A = Au MAX phases has been reported [3]. The Au-containing MAX phases were formed by thermally induced substitutional reaction in ternary and quaternary compounds [3]. Following this post-synthesis modification applied to the (Cr_0.5Mn_0.5)₂GaC films the new magnetic (Cr_0.5Mn_0.5)₂AuC system has been stabilized [4]. The substitution of Au for resulted in a expansion of c-axis by about 3.3% perpendicular to the basal plane. Here we present a direct comparative study of magnetic properties of (Cr_0.5Mn_0.5)₂GaC and (Cr_0.5Mn_0.5)₂AuC films and suggest a pathway for tuning magnetic properties in inherently nanolaminated hexagonal MAX phase carbides. This work is supported by DFG, Grant No. SA 3095/2-1 [1] A. Petruhins, et al., J. Mater. Sci. 50, 4495 (2015). [2] A. S. Ingason, et al., Mater. Res. Lett. 2, 89 (2014). [3] H. Fashandi, et al., Nature Mat. 16, 814 (2017). [4] C.-C. Lai, et al., APL Mat. 6, 026104 (2018).