Electronic Structures and Magnetic Properties of Fe/Si/Fe Trilayer

  • Published : 1996.06.01

Abstract

Employing the LMTO band method, we have studied electronic and magnetic properties of Fe/Si/Fe trilayer in which the z-direction is chosen to be (111) direction of FeSi with B2 phase, We have also determined electronic structure of bulk FeSi, as a reference material. The ground state of FeSi is paramagnetic insulator with a band gap of 0.05 eV. Band structures of Fe/Si/Fe with varying the thickness of the spacer layer reveal that the spacer layer is metallic, and the states along the growth direction do not disperse much reflecting a two-dimensional nature. Magnetic moment of Fe atom in the interfacial layer of Fe/Si/Fe is reduced a lot as compared to the bulk value, suggesting a strong hybridization between Fe and Si states. The geometry of the Fermi surface indicates that the magnetic coupling period of ~8ML (monolayers) in Fe/Si/Fe is explained with a short Fermi wave vector of bcc Si.

Keywords

References

  1. Phys. Rev. Lett. v.61 M. N. Baibich;J. M. Broto;A. Fert;F. Nguyen Van Dau;F. Petroff
  2. J. Magn. Magn. Mater. v.114 S. Toscano;B. Briner;H. Hopster;M. Landolt
  3. Phys. Rev. Lett. v.69 J. E. Ortega;F. J. Himpsel
  4. Phys. Rev. v.B43 H. Hasegawa
  5. Phys. Rev. v.B47 R. P. Erickson;K. B. Hathaway;J. R. Cullen
  6. Phys. Rev. Lett. v.71 M. van Schilfgaarde;W. A. Harrison
  7. Phys. Rev. Lett. v.71 B. A. Jones;C. B. Hanna
  8. J. Magn. Magn. Mater. v.117 E. E. Fullerton;J. E. Mattson;S. R. Lee;C. H. Sowers;Y. Y. Huang;G. Felcher;S. D. Bader;F. T. Parker
  9. Phys. Rev. Lett. v.74 K. Inomata;K. Yusu;Y. Saito
  10. Phy. Rev. v.B45 H. von Kanel;K. A. Mader;E. Muller;N. Onda;H. Sirringhaus
  11. J. Appl. Phys. v.69 J. M. Gallego;R. Miranda
  12. J. Vac. Sci. Technol. v.A5 T. Urano;T. Ogawa;T. Kanaji
  13. Phys. Rev. Lett. v.76 V. I. Anisimov;S. Yu Ezhov;I. S. Elfimov;I. V. Solovyev;T. M. Rice