Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 57: Posters Magnetism II

MA 57.23: Poster

Thursday, March 19, 2020, 15:00–18:00, P3

Deposition and characterisation of ferromagnetic τ-MnAl thin films — •Daniel Scheffler¹, Michaela Lammel², Torsten Mix², Thomas G. Woodcock², Andy Thomas², and Sebastian T.B. Goennenwein¹ — ¹Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany — ²Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden), 01069 Dresden, Germany

τ-MnAl is a ferromagnetic phase with high uniaxial magnetocrystalline anisotropy. This makes the material attractive for permanent magnet applications, such that the magnetic properties are well studied in polycrystalline bulk samples. In contrast, the properties of single crystalline thin films, especially magnetoresistance and magnetic damping, have not been systematically investigated. We have successfully grown single crystalline τ-MnAl thin films via cosputtering. We used high resolution X-ray diffraction and SQUID magnetometry to quantify the structural and magnetic properties of our films, and find good structural quality as well as a strong perpendicular magnetic anisotropy. We also discuss the impact of the deposition parameters like substrate temperature and the post annealing temperature, which are key parameters to improve the crystalline quality and magnetic properties of τ-MnAl films.