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MA: Fachverband Magnetismus

MA 52: Poster II - Magnetic Heusler compounds, Magnetic shape memory alloys, Thin Films, Micro-/Nano-structured magnetic materials, Graphene, Spins in organics, Magnetic imaging, Surface Magnetism, Spin excitations/Torque, Spincaloric transport

MA 52.2: Poster

Freitag, 30. März 2012, 11:00–14:00, Poster A

Magnetic properties of the full Heusler compounds Mn_2+xV_1−xSi — •Christian Sterwerf, Markus Meinert, Jan-Michael Schmalhorst, and Günter Reiss — Dünne Schichten und Physik der Nanostrukturen, Fakultät für Physik, Universität Bielefeld, 33501 Bielefeld, Deutschland

Half-metallic Heusler compounds have attracted much interest in the recent years because of their possible applications in spintronic devices. They provide a high spin polarization of the electrons at the Fermi level. A fully compensated half metallic ferrimagnet is ideal for spintronic devices since a vanishing magnetization leads to low stray fields and a lower energy consumption.

Thin films of the ternary full Heusler compound Mn_2+xV_1−xSi were prepared by DC and RF magnetron co-sputtering on MgO (001) substrates. At x=0.5 the compound has 24 valence electrons per formula unit, resulting in complete magnetic compensation according to the Slater Pauling rule m=N−24.

In this work we investigate the films by means of x-ray diffraction, x-ray reflectometry, magnetometry techniques and transport measurements, especially of the anomalous Hall effect.