Regensburg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DS: Fachverband Dünne Schichten

DS 21: Layer Deposition (ALD, MBE, Sputtering, ...)

DS 21.3: Vortrag

Donnerstag, 8. September 2022, 10:00–10:15, H14

Growth and Characterization of Epitaxial (Cr1-xMnx)2GaC MAX Phase Thin Films by Pulsed Laser Deposition — •Ivan Tarasov, Hanna Pazniak, Michael Farle, and Ulf Wiedwald — Faculty of Physics and Center for Nanointegration (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany

Due to their nanolaminated structure, tunable chemistry, and high oxidation resistance, MAX phases (where M is an early transition metal, A is a main group element, and X is carbon or nitrogen) are interesting materials for a wide variety of applications. The partial substitution of M atoms is one of the ways to tailor their properties to specific applications. In this study, we grow (Cr1-xMnx)2GaC MAX phase films to fine-tune their magnetic response by stoichiometry variations for x = 0-1. High-quality epitaxial (Cr1-xMnx)2GaC MAX phase films (thickness 30 * 100 nm) are synthesized by pulsed laser deposition on MgO (111) substrates using (Mn50Cr50)66Ga34, Mn0.66Ga0.34, Cr66Ga34 and C targets. The combination of structural and morphological characterization reveals a strong competition between the (Cr1-xMnx)2GaC MAX phase and (Cr1-xMnx)3GaC, (Cr1-xMnx)3Ga phases. We suppress the formation of side phases by variation of the growth temperature and the formation of seed layers. Vibrating sample magnetometry of the MAX phase reveals increasing magnetization and ordering temperature with increasing Mn content. Funding by the Deutsche Forschungs*gemeinschaft (DFG) within CRC/TRR 270, project B02 (Project-ID 405553726) is gratefully acknowledged.