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Characterization of the Surface Electronic Properties of Co2Cr1−xFexAl

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Abstract

Due to their half metallic properties and high Curie temperatures Heusler alloys are potential key materials for future application in spin-based devices. One crucial aspect for device performance is the electron spin polarization at surfaces and interfaces, which in general deviates from bulk values due to the different bonding environment. Here, we present spin-resolved photoemission data on surfaces of Co2Cr1−xFexAl thin films. The influence of bulk and surface contributions on the spin-resolved spectra is discussed for x=0, x=0.4 and x=1, yielding information on disorder, surface states and calculation schemes that are consistent with our spin-resolved photoemission experiments.

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Acknowledgements

This work was supported by the Research Center OPTIMAS and the DFG Forschergruppe through DFG FG559 “New materials with high spin polarization” (project P10). We would like to thank C. Herbort and M. Jourdan for preparation of the samples and G.H. Fecher for supporting us with the band structure data. B. Krenzer is acknowledged for discussion about the interpretation of LEED patterns; R. Fetzer and J. Fischer are acknowledged for experimental assistance.

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Authors and Affiliations

  1. Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödingerstr. 46, 67663, Kaiserslautern, Germany

    Jan-Peter Wüstenberg, Martin Aeschlimann & Mirko Cinchetti

Authors
  1. Jan-Peter Wüstenberg
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  2. Martin Aeschlimann
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  3. Mirko Cinchetti
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Correspondence to Mirko Cinchetti .

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Editors and Affiliations

  1. Inst. Anorg. Chemie und Analyt. Chemie, Universität Mainz, Germany, Staudingerweg 9, Mainz, 55099, Germany

    Claudia Felser

  2. Inst. Anorg. Chemie und Analyt. Chemie, Universität Mainz, Germany, Staudingerweg 9, Mainz, 55099, Germany

    Gerhard H Fecher

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Wüstenberg, JP., Aeschlimann, M., Cinchetti, M. (2013). Characterization of the Surface Electronic Properties of Co2Cr1−xFexAl. In: Felser, C., Fecher, G. (eds) Spintronics. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3832-6_12

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