Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 25: Magnetic Heusler Compounds

MA 25.5: Vortrag

Mittwoch, 13. März 2013, 10:30–10:45, H10

Basic investigations of hard magnetic binary Mn_(3−x)Ga bulk materials — •Hannes Stummer, Christian Blum, Wolfgang Löser, Sabine Wurmehl, and Bernd Büchner — Leibniz Institut für Festkörper- und Werkstoffforschung Dresden, Germany

Polycrystalline materials from the manganese rich part of the Manganese-Gallium phase system provide hard magnetic properties with high coercive fields and low saturation.[1] These binary intermetallic Heusler-type compounds assume as starting material for new permanent magnetic materials.[2] The presented investigations deal with the polycrystalline compounds, their micro- and crystal structure analysis in addition to the magnetic properties. The fundamental studies give information about the phase formation in the complex binary phase system of Mn-Ga. Also a new promising synthesis route for the crystallization of single-crystalline samples, needed for comprehensive magnetic measurements, is presented. Furthermore it is shown that by slightly changing of the material composition new permanent magnetic materials can be produced. [1]Balke et al., Appl. Phys. Lett. 90, 152504 (2007) [2]Winterlik et al., Physical Review B, 77, 054406 (2008)