Dresden 2011 – wissenschaftliches Programm

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

MA: Fachverband Magnetismus

MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)

MA 63.94: Poster

Freitag, 18. März 2011, 11:00–14:00, P2

Structural and magnetic properties of tetragonal Heusler compounds Mn_2−xFe_1+xGa — •Teuta Gasi, Jürgen Winterlik, Benjamin Balke, Gerhard H. Fecher, and Claudia Felser — Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg - University, 55099 Mainz

Heusler compounds such as tetragonal phase of Mn_3−xGa are currently receiving increased interest. These materials play an important role due to their multifunctional properties and high potential for applications in STT-MRAM technology. STT-MRAMs require high Curie temperatures, low Gilbert damping constants, and low magnetic moments. This contribution focuses on the structural and magnetic properties of tetragonal Heusler compounds Mn_2−xFe_1+xGa. These compounds are of exceptional importance due to their large diversity of adaptive magnetic properties and their tunability by variation of several physical parameters such as temperature, magnetic field, or electron-doping. The series of samples was successfully synthesized by arc-melting and characterized. The magnetic measurements show that all these materials show high T_Cs above 600 K and diverse magnetic hardness. Additionally, we found that the compound Fe₂MnGa shows magnetic shape memory behavior. This work is supported by the Deutsche Forschungsgemeinschaft through the ASPIMATT projects TP 1.2-A (CH 952/1-1) and TP 2.3-A (FE 633/11-1).