SKM 2021 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 1: Thin Film Properties

DS 1.4: Vortrag

Montag, 27. September 2021, 10:45–11:00, H3

Epitaxial growth of (Cr1-xFex)2AlC MAX Phase thin films by pulsed laser deposition — •Hanna Pazniak¹, Marc Stevens¹, Martin Dahlqvist², Benjamin Zingsem^1,3, Johanna Rosen², Michael Farle^1,4, and Ulf Wiedwald¹ — ¹Faculty of Physics and Center for Nanointegration (CENIDE), University of Duisburg-Essen, Germany — ²Thin Film Physics Division, Department of Physics, Chemistry, and Biology (IFM), Linköping University, Sweden — ³Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, Germany — ⁴Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Russian Federation

MAX phase epitaxial thin films attract increasing attention with respect to high-temperature applications [1]. The partial substitution of M atoms in their nanolaminated structure is a promising way to tailor magnetic properties. In this study, we synthesized (Cr1-xFex)2AlC (0<x<0.2) epitaxial thin films by Pulsed Laser Deposition on MgO(111) and Al2O3(0001) at 600^∘C using pure elemental targets. By combining structural characterization and density functional theory, we explored the phase composition of synthesized (Cr1-xFex)2AlC solid solutions, finding a Fe solubility limit of 4 at.%. Excess Fe leads to the formation of the (Cr,Fe)5Al8 intermetallic secondary phase.

[1] M. Stevens, H. Pazniak, et al., MRL 9, 343 (2021).

Funding by the DFG within CRC/TRR 270, project B02 (Project-ID 405553726) is acknowledged.