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MA: Fachverband Magnetismus

MA 15: Poster:ThinFilms(1-33),Transp.(34-49),ExchBias(50-56),
Spindynamics(57-70),Micro-nanostr.Mat.(71-82),
Particles/Clust.(83-88), Mag.Imag./Surface(89-96),
Spinelectronics(97-109), Theory/Micromag.(110-116),
Spinstruct/Phasetr.(117-128),Magn.Mat.(129-139),
Aniso.+Measuring(140-145), MolMag.(146-152),
MSMA(153-156)

MA 15.10: Poster

Dienstag, 27. März 2007, 15:00–19:00, Poster A

Towards a full Heusler alloy showing room temperature half-metallicity at the surface — •Mirko Cinchetti¹, Jan-Peter Wüstenberg¹, Andrés Conca², Martin Jourdan², and Martin Aeschlimann¹ — ¹University of Kaiserslautern, Institute of Physics, Erwin-Schrödingerstr. 46, 67663 Kaiserslautern, Germany — ²University of Mainz, Institute of Physics, Staudinger Weg 7, 55128 Mainz, Germany

The spin polarization at the surface region of a 100 nm Co₂Cr_0.6Fe_0.4Al film grown epitaxially on MgO(100) with a 10 nm Fe buffer layer has been investigated by means of spin resolved photoemission. We show that a careful in situ preparation of the sample surface leads to reproducible values for the room temperature spin polarization up to 45% at the Fermi level. To our knowledge, this is the highest value measured so far at the surface region of a full Heusler alloy at room temperature.