Hostname: page-component-84b7d79bbc-4hvwz Total loading time: 0 Render date: 2024-07-26T20:53:20.888Z Has data issue: false hasContentIssue false
  • English
  • Français

Spin Polarized Electron Spectroscopies of 3d and 4f Systems

Published online by Cambridge University Press:  03 September 2012

H. Hopster
H. Hopster*
Affiliation:
Department of Physics and Institute for Surface and Interface, Science, University of California, Irvine, CA 92717
Get access

Abstract

Recent results from spin polarized electron spectroscopie studies of surfaces and ultrathin films are presented. The Magnetic coupling of 3d transition Metals (Cr,Mn) to the Fe (100) surface is studied by spin polarized electron energy loss spectroscopy. The first atomic layer of Cr and mn aligns antiparallel to the Fe. For larger thicknesses we find evidence for layer-by-layer antiferromagnetic order. In the range of 1–6 atomic layers the behavior is more complex with the surface of the Cr films showing preferential ferromagnetic alignment while the mn surface aligns antiparallel to the Fe substrate.

Secondary electrons from Gd (0001) surfaces are shown to be highly spin polarized. However, no enhancement mechanism at low kinetic energy as in the 3d transition metals is observed indicating the absence of strongly spin dependent inelastic scattering in Gd. Temperature dependent spin polarized 4f photoemis-sion results show almost complete polarization demonstrating ferromagnetic surface coupling. However, a perpendicular surface magnetization component is found indicating surface spin canting. A large enhancement of the surface Curie temperature is also present.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 313: Symposium Q1 – Magnetic Ultrathin Films, Multilayers and Surfaces/Magnetic Interfaces-Physics and Characterizations , 1993 , 565
Copyright
Copyright © Materials Research Society 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Hopster, H., in Ultra-thin Magnetic Structures, Vol. I, edited by Heinrich, B. and Bland, A. J., Springer Verlag (1993)Google Scholar
2. Abraham, D.L. and Hopster, H., Phys. Rev. Lett. 62, 1159 (1989)Google Scholar
3. Venus, A. and Kirschner, J., Phys. Rev. B 37, 2199 (1988)Google Scholar
4. Kamper, K.-P., Abraham, D.L., and Hopster, , Phys. Rev. B 45, 14335 (1992)Google Scholar
5. Hopster, H. and Abraham, D.L., Phys. Rev. B 40, 7054 (1989)Google Scholar
6. Grunberg, P., Demokritov, S., Fuss, A., Schreiber, R., Wolf, J.A., and Purcell, S.T., J. Magn. Magn. Mater. 104, 1734 (1992)Google Scholar
7. Unguris, J., Celotta, R.J., and Pierce, D.T., Phys. Rev. Lett. 67, 149 (1991)Google Scholar
8. Jungblut, R., Roth, Ch., Hillebrecht, F.Ü., and Kisker, E., J. Appl. Phys. 70, 5923 (1991)Google Scholar
9. Walker, T.G., Pang, A.W., Hopster, H., and Alvarado, S.F., Phys. Rev. Lett. 69, 1121 (1992)Google Scholar
10. Klebanoff, L. E., Robey, S.W., Liu, G., and Shirley, D.A., Phys. Rev. B 31, 6379 (1985)Google Scholar
11. Victora, R.H. and Falicov, L.M., Phys. Rev. B 31, 7335 (1985);Google Scholar
Fu, C.L. and Freeman, A.J., Phys. Rev. B 33, 1755 (1985)Google Scholar
12. Purcell, S.T., Johnson, M.T., McGee, N.W.E., Coehorn, R., and Hoving, W., Phys. Rev. B 45, 13064 (1992)Google Scholar
13. Walker, T.G. and Hopster, H., MRS Spring Meeting 1993, this proceedingsGoogle Scholar
14. Walker, T.G. and Hopster, H., submitted to Phys. Rev. BGoogle Scholar
15. Unguris, J., Celotta, R.J., and Pierce, D.T., Phys. Rev. Lett.Google Scholar
16. Zhang, X., Hsu, H., Dunning, F.B., and Walters, G.K., Phys. Rev. B 44, 9133 (1991)Google Scholar
17. Paul, O., Toscano, S., and Landolt, M., to be published;Google Scholar
Paul, O., Ph.D. Thesis, ETH Zurich (1990)Google Scholar
18. Pappas, D.P., Kamper, K.-P., and Hopster, H., Phys. Rev. Lett. 64, 3179 (1990)Google Scholar
19. Tang, H., Weiler, D., Walker, T.G., Scott, J.C., Chappert, C., Hopster, H., Pang, A.W., Dessau, D.S., and Pappas, D.P., submitted to Phys. Rev. Lett.Google Scholar
20. Chappert, C., Weiler, D., Tang, H., Scott, J.C., Hopster, H., and Pappas, D.P., MRS Spring Meeting 1993, this proceedingsGoogle Scholar
21. Tang, H., Walker, T.G., Hopster, H., Pappas, D.P., Weller, D., and Scott, J.C., Phys. Rev. B 47, 5049 (1993)Google Scholar
22. Rau, C. and Eichner, S., Phys. Rev. B 34, 6347 (1986)Google Scholar
23. Weiler, D., Alvarado, S.F., Gudat, W., Schroder, K., and Campagna, M., Phys. Rev. Lett. 54, 1555 (1985)Google Scholar
24. Wu, R., Li, C., Freeman, A.J., Phys. Rev. B 44, 9400 (1991)Google Scholar
25. Li, Dongqi, Zhang, Jiandi, Dowben, P.A., and Onellion, M., Phys. Rev. B 45, 7272 (1992)Google Scholar
26. Mulhollan, G.A., Garrison, K., and Erskine, J.L.. Phys. Rev. Lett. 69, 3240 (1992)Google Scholar
27. Li, Dongqi, Zhang, Jiandi, Dowben, P.A., Garrison, K., Johnson, P.D., Tang, H., Walker, T.G., Hopster, H., Scott, J.C., Weiler, D., and Pappas, D.P., MRS Spring Meeting 1993, this proceedingsGoogle Scholar