Advertisement

Spintronics pp 271-284 | Cite as

Characterization of the Surface Electronic Properties of Co2Cr1−xFexAl

  • Jan-Peter Wüstenberg
  • Martin Aeschlimann
  • Mirko Cinchetti

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.

Keywords

Fermi Energy Spin Polarization Heusler Alloy Surface Unit Cell Bulk Band Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

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.

References

  1. 1.
    Balke B, Wurmehl S, Fecher G, Felser C, Kübler J (2008) Sci Technol Adv Mater 9:014102 CrossRefGoogle Scholar
  2. 2.
    Galanakis I, Mavropoulos P, Dederichs PH (2006) J Phys D, Appl Phys 39:765 CrossRefGoogle Scholar
  3. 3.
    Picozzi S, Continenza A, Freeman AJ (2004) Phys Rev B 69:094423 CrossRefGoogle Scholar
  4. 4.
    Miura Y, Nagao K, Shirai M (2004) Phys Rev B 69:144413 CrossRefGoogle Scholar
  5. 5.
    Felser C, Elmers HJ, Fecher G (2005) The properties of Co2Cr1−xFexAl Heusler compounds, vol 676. Springer, Berlin, p 113 Google Scholar
  6. 6.
    Kudryavtsev YV, Uvarov VN, Oksenenko VA, Lee YP, Kim JB, Hyun YH, Kim KW, Rhee JY, Dubowik J (2008) Phys Rev B 77:195104 CrossRefGoogle Scholar
  7. 7.
    Hoshino T, Fujima N, Asato M, Tatsuoka H (2010) J Alloys Compd 504:S531 CrossRefGoogle Scholar
  8. 8.
    Miura Y, Uchida H, Oba Y, Abe K, Shirai M (2008) Phys Rev B 78:064416 CrossRefGoogle Scholar
  9. 9.
    Inomata K, Wojcik M, Jedryka E, Ikeda N, Tezuka N (2008) Phys Rev B 77:214425 CrossRefGoogle Scholar
  10. 10.
    Herbort C, Arbelo E, Jourdan M (2009) J Phys D, Appl Phys 42:084006 CrossRefGoogle Scholar
  11. 11.
    Herbort C, Arbelo Jorge E, Jourdan M (2009) Appl Phys Lett 94:142504 CrossRefGoogle Scholar
  12. 12.
    Zarei S, Hashemifar S, Akbarzadeh H, Hafari Z (2009) J Phys Condens Matter 21:055002 CrossRefGoogle Scholar
  13. 13.
    Fecher G, Kandpal H, Wurmehl S, Morais J, Lin HJ, Elmers HJ, Schönhense G, Felser C (2005) J Phys Condens Matter 17:7237 CrossRefGoogle Scholar
  14. 14.
    Fecher G, Felser C (2007) J Phys D, Appl Phys 40:1582 CrossRefGoogle Scholar
  15. 15.
    Karthik SV, Rajanikanth A, Takahashi YK, Okhubo T, Hono K (2006) Appl Phys Lett 89:052505 CrossRefGoogle Scholar
  16. 16.
    Wurmehl S, Kohlhepp JT, Swagten HJM, Koopmans B (2008) J Phys D, Appl Phys 41:115007 CrossRefGoogle Scholar
  17. 17.
    Inomata K, Okamura S, Miyazaki A, Kikuchi M, Tezuka N, Wojcik M, Jedryka E (2006) J Phys D, Appl Phys 39:816 CrossRefGoogle Scholar
  18. 18.
    Xu X, Zhang D, Wang W, Wu Y, Wang Y, Jiang Y (2010) J Magn Magn Mater 322:3351 CrossRefGoogle Scholar
  19. 19.
    Jullière M (1975) Phys Lett A 54:225 CrossRefGoogle Scholar
  20. 20.
    Kallmayer M, Klaer P, Schneider H, Jorge EA, Herbort C, Jakob G, Jourdan M, Elmers HJ (2009) Phys Rev B 80:020406(R) CrossRefGoogle Scholar
  21. 21.
    Klaer P, Kallmayer M, Blum CGF, Graf T, Barth J, Balke B, Fecher GH, Felser C, Elmers HJ (2009) Phys Rev B 80:144405 CrossRefGoogle Scholar
  22. 22.
    Klaer P, Arbelo Jorge E, Jourdan M, Wang WH, Sukegawa H, Inomata K, Elmers HJ (2010) Phys Rev B 82:024418 CrossRefGoogle Scholar
  23. 23.
    Irkhin V, Katsnelson M, Lichtenstein A (2007) J Phys Condens Matter 19:315201 CrossRefGoogle Scholar
  24. 24.
    Chadov S, Fecher G, Felser C, Minàr J, Braun J, Ebert H (2009) J Phys D, Appl Phys 42:084002 CrossRefGoogle Scholar
  25. 25.
    Hashemifar SJ, Kratzer P, Scheffler M (2005) Phys Rev Lett 94:096402 CrossRefGoogle Scholar
  26. 26.
    Mathias S, Miaja-Avila L, Murnane MM, Kapteyn H, Aeschlimann M, Bauer M (2007) Rev Sci Instrum 78:083105 CrossRefGoogle Scholar
  27. 27.
    Kirschner J (1985) Polarized electrons at surfaces. Springer, Berlin Google Scholar
  28. 28.
    Wang W, Przybylski M, Kuch W, Chelaru L, Wang J, Lu Y, Barthel J, Meyerheim H, Kirschner J (2005) Phys Rev B 71:144416 CrossRefGoogle Scholar
  29. 29.
    Cinchetti M, Wüstenberg J-P, Sanchez Albaneda M, Steeb F, Conca A, Jourdan M, Aeschlimann M (2007) J Phys D, Appl Phys 40:1544 CrossRefGoogle Scholar
  30. 30.
    Wüstenberg J-P, Cinchetti M, Albaneda MS, Bauer M, Aeschlimann M (2007) J Magn Magn Mater 316:E411 CrossRefGoogle Scholar
  31. 31.
    Zangwill A (1988) Physics at surfaces. Cambridge University Press, Cambridge CrossRefGoogle Scholar
  32. 32.
    Wüstenberg J-P et al. (2012) Phys Rev B 85:064407 CrossRefGoogle Scholar
  33. 33.
    Aeschlimann M, Bauer M, Pawlik S, Weber W, Burgermeister R, Oberli D, Siegmann HC (1997) Phys Rev Lett 79:5158 CrossRefGoogle Scholar
  34. 34.
    Gaier O, Hamrle J, Trudel S, Parra AC, Hillebrands B, Arbelo E, Herbort C, Jourdan M (2009) J Phys D, Appl Phys 42:084004 CrossRefGoogle Scholar
  35. 35.
    Jourdan M, Jorge EA, Herbort C, Kallmayer M, Klaer P, Elmers HJ (2009) Appl Phys Lett 95:172504 CrossRefGoogle Scholar
  36. 36.
    Wüstenberg J-P, Fischer J, Herbort C, Jourdan M, Aeschlimann M, Cinchetti M (2009) J Phys D, Appl Phys 42:084016 CrossRefGoogle Scholar
  37. 37.
    Wurmehl S, Fecher G, Kroth K, Kronast F, Dürr H, Takeda Y, Saitoh Y, Kobayashi K, Lin HJ, Schönhense G, Felser C (2006) J Phys D, Appl Phys 39:803 CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Jan-Peter Wüstenberg
    • 1
  • Martin Aeschlimann
    • 1
  • Mirko Cinchetti
    • 1
  1. 1.Department of Physics and Research Center OPTIMASUniversity of KaiserslauternKaiserslauternGermany

Personalised recommendations