Electrical Spin Injection in Perpendicular Magnetized FePt/MgO/GaAs Heterostructures at Room Temperature

  • Asawin Sinsarp
  • Takashi Manago
  • Fumiyoshi Takano
  • Hiro Akinaga


We report zero-magnetic-field spin injection from FePt into GaAs at room temperature using FePt/MgO/GaAs-based light-emitting diode heterostructures. Experiments are performed on two samples with different compositions; Fe61Pt39 and Fe57Pt43. The polarizations of injected electrons at 0 T for these two samples are at least 1.5% and 3.3%, respectively. The higher zero-magnetic-field injected spin polarization is considered to be due to the better remanent perpendicular magnetization of the FePt layer in the sample with Fe57Pt43.


Spin injection Perpendicular magnetization Tunneling junction FePt MgO 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Zutic, I., Fabian, J., Das Sarma, S.: Rev. Mod. Phys. 76, 323 (2004) CrossRefADSGoogle Scholar
  2. 2.
    Jonker, B.T.: Proc. IEEE 91, 727 (2003) CrossRefGoogle Scholar
  3. 3.
    Rashba, E.I.: Phys. Rev. B 62, R16267 (2000) CrossRefADSGoogle Scholar
  4. 4.
    Fert, A., Jaffres, H.: Phys. Rev. B 64, 184420 (2001) CrossRefADSGoogle Scholar
  5. 5.
    Zhu, H.J., Ramsteiner, M., Kostial, H., Wassermeier, M., Schonherr, H.P., Ploog, K.H.: Phys. Rev. Lett. 87, 016601 (2001) CrossRefADSGoogle Scholar
  6. 6.
    Hanbicki, A.T., Jonker, B.T., Itskos, G., Kioseoglou, G., Petrou, A.: Appl. Phys. Lett. 80, 1240 (2002) CrossRefADSGoogle Scholar
  7. 7.
    Ramsteiner, M., Hao, H.Y., Kawaharazuka, A., Zhu, H.J., Kastner, M., Hey, R., Daweritz, L., Grahn, H.T., Ploog, K.H.: Phys. Rev. B 66, 081304 (2002) CrossRefADSGoogle Scholar
  8. 8.
    van ’t Erve, O.M.J., Kioseoglou, G., Hanbicki, A.T., Li, C.H., Jonker, B.T.: Appl. Phys. Lett. 89, 072505 (2006) CrossRefGoogle Scholar
  9. 9.
    Manago, T., Akinaga, H.: Appl. Phys. Lett. 81, 694 (2002) CrossRefADSGoogle Scholar
  10. 10.
    Motsnyi, V.F., De Boeck, J., Das, J., Van Roy, W., Borghs, G., Goovaerts, E., Safarov, V.I.: Appl. Phys. Lett. 81, 265 (2002) CrossRefADSGoogle Scholar
  11. 11.
    van ’t Erve, O.M.J., Kioseoglou, G., Hanbicki, A.T., Li, C.H., Jonker, B.T., Mallory, R., Yasar, M., Petrou, A.: Appl. Phys. Lett. 84, 4334 (2004) CrossRefADSGoogle Scholar
  12. 12.
    Jiang, X., Wang, R., Shelby, R.M., Macfarlane, R.M., Bank, S.R., Harris, J.S., Parkin, S.S.P.: Phys. Rev. Lett. 94, 056601 (2005) CrossRefADSGoogle Scholar
  13. 13.
    Jonker, B.T., Park, Y.D., Bennett, B.R., Cheong, H.D., Kioseoglou, G., Petrou, A.: Phys. Rev. B 62, 8180 (2000) CrossRefADSGoogle Scholar
  14. 14.
    Dyakonov, M.I., Perel, V.I.: In: Meier, F., Zakharchenya, B.P. (eds.) Optical Orientation, pp. 11–71. North-Holland, Amsterdam (1984) Google Scholar
  15. 15.
    Gerhardt, N.C., Hovel, S., Brenner, C., Hofmann, M.R., Lo, F.Y., Reuter, D., Wieck, A.D., Schuster, E., Keune, W., Westerholt, K.: Appl. Phys. Lett. 87, 032502 (2005) CrossRefGoogle Scholar
  16. 16.
    Adelmann, C., Hilton, J.L., Schultz, B.D., McKernan, S., Palmstrom, C.J., Lou, X., Chiang, H.S., Crowell, P.A.: Appl. Phys. Lett. 89, 112511 (2006) CrossRefGoogle Scholar
  17. 17.
    Shima, T., Moriguchi, T., Mitani, S., Takanashi, K.: Appl. Phys. Lett. 80, 288 (2002) CrossRefADSGoogle Scholar
  18. 18.
    Sinsarp, A., Manago, T., Takano, F., Akinaga, H.: J. Jpn. Appl. Phys. 46, L4 (2007) CrossRefADSGoogle Scholar
  19. 19.
    Manago, T., Sinsarp, A., Akinaga, H.: J. Appl. Phys., submitted Google Scholar
  20. 20.
    Okamoto, S., Kikuchi, N., Kitakami, O., Miyazaki, T., Shimada, Y., Fukamichi, K.: Phys. Rev. B 66, 024413 (2002) CrossRefADSGoogle Scholar
  21. 21.
    Moriyama, T., Mitani, S., Seki, T., Shima, T., Takanashi, K., Sakuma, A.: J. Appl. Phys. 95, 6789 (2004) CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Asawin Sinsarp
    • 1
    • 3
  • Takashi Manago
    • 2
  • Fumiyoshi Takano
    • 1
  • Hiro Akinaga
    • 1
  1. 1.Nanotechnology Research Institute (NRI)National Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan
  2. 2.Department of Electronics and Computer Science, Faculty of Science EngineeringTokyo University of Science, YamaguchiSanyo-OnodaJapan
  3. 3.Department of Physics, Faculty of ScienceMahidol UniversityBangkokThailand

Personalised recommendations