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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 19.65: Poster
Dienstag, 15. März 2011, 10:45–13:00, P2
Investigation of single-crystalline magnetic shape memory alloys: Ni-Mn-X (X = In, Ga, Sb) — •Christian Schöppner1, Santa Pile1, Ivan Titov1, Detlef Spoddig1, Ralf Meckienstock1, Mehmet Acet1, Michael Farle1, Jian Liu2, Nils Scheerbaum2, Sandra Weiß2, and Oliver Gutfleisch2 — 1Universität Duisburg-Essen, Fakultät für Physik, AG Farle, 47057 Duisburg, Germany — 2IFW Dresden, Institue for Metallic Materials, P.O. Bos 270116, 01171 Dresden
Ni-Mn-based magnetic shape memory alloys are promising active materials for actuators and sensors, since they provide huge field-induced strains up to 10% due to magnetic field-induced structural reorientation or magnetic field-induced phase transformation. For a deeper understanding of these effects, the magnetic-structural properties of Ni-Mn-X (X= In, Sb, Ga) magnetic shape memory alloys are investigated on single-crystalline samples in the µm-range by electron-backscatter-diffraction (EBSD), magnetization analysis and ferromagnetic-resonance (FMR). Temperature and angular dependent FMR measurements on single-crystalline samples provide the possibility to determine crystalline anisotropy constants in certain crystallographic planes in austenite and martensite states and can be put into context with M(H)-data measured in the temperature range 5 ≤ T ≤ 400K.
Work supported by the Deutsche Forschungsgemeinschaft (SPP1239)