Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 3: Magnetic Half Metals and Oxides

MA 3.2: Vortrag

Montag, 23. März 2009, 11:15–11:30, HSZ 401

Surface properties of Co based full Heusler alloys — •Jan-Peter Wüstenberg, Sabine Neuschwander, Alexander Fischer, Martin Aeschlimann, and Mirko Cinchetti — Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin Schrödingerstr. 46, 67663 Kaiserslautern, Germany

Half metallic Heusler compounds are promising candidates for spintronics applications due to their predicted minority spin gap at the Fermi energy. Unfortunately, the proof of half metallicity at the surface is still missing. In this contribution we present spin resolved low energy photoemission data as well as results from LEED and Auger spectroscopy of several Co based full Heusler alloys. The influence of a thin MgO tunneling barrier and small coverages of the organic semiconductor copper-phthalocyanine (CuPC) on the surface spin polarization is discussed and compared to results of the free Heusler surface.