Berlin 2018 – wissenschaftliches Programm

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

MA: Fachverband Magnetismus

MA 42: Thin films – anisotropy

MA 42.2: Vortrag

Donnerstag, 15. März 2018, 09:45–10:00, EB 301

Tunable magnetic properties in perpendicularly magnetized Mn-Fe-Ga tetragonal Heusler for spintronic applications — •Adel Kalache¹, Anastasios Markou¹, Gerhard H. Fecher¹, Susanne Selle², Thomas Höche², and Claudia Felser¹ — ¹Max Planck Institut CPFS, Dresden, Germany — ²Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Halle, Germany

Perpendicular magnetic anisotropy was studied in tetragonal D0₂₂ Mn-Fe-Ga thin films on different substrates as candidates for spintronic applications. By varying the Mn/Fe ratio, it is possible to tune the magnetic properties such as magnetization and coercivity, while retaining out-of-plane anisotropy over large composition range. The substitution of Fe in Mn_2.6−xFe_xGa_1.4 maximizes the magnetic anisotropy at a Fe content of x=1. Transmission electron microscope investigations confirmed the single crystalline nature of the film as well as the homogeneity by elemental mapping using EDXS. We emphasize that a careful control over composition, in this case Ga content, is essential to tailor the magnetic properties in Heusler thin films. These findings are expected to benefit the integration of tetragonal Heusler compounds into spintronic devices.