Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Poster I (Bio- and Molecular Magnetism/ Magnetic Particles and Clusters/ Micro- and Nanostructured Magnetic Materials/ Magnetic Materials/ Multiferroics/ Magnetic Shape Memory Alloys/ Electron Theory of Magntism/ Spincaloric Transport/ Magnetic Coupling and Exchange Bias/ Magnetization Dynamics/ Micromagnetism and Computational Magnetics)

MA 19.67: Poster

Dienstag, 15. März 2011, 10:45–13:00, P2

Structural and magnetic properties of tetragonal Heusler compounds Mn2-xFe1+xGa (x=0.2-1) — •Teuta Gasi, Jürgen Winterlik, and Claudia Felser — Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University, Mainz, Germany

The subject of this brief report are the structural and magnetic properties of tetragonal Heusler compounds Mn2- xFe1+xGa (x=0.2-1). These materials play an important role because of their multifunctional application in STT-MRAM technology, STO etc. A series of samples were successfully synthesized by arc-melting and characterized. The crystal structure was determined at RT by XRD and the magnetic measurements were done using SQUID magnetometer in the temperature range 2K-800K. STT-MRAM requires high Tc, low Gilbert damping constant, low magnetic moment. The magnetic measurements show that all these materials show high Tc above 600 K and diverse magnetic hardness. We have found that a compound Fe2MnGa demonstrates the shape-memory effect.