next up previous
Next: Introduction Up: Papers about X-ray Absorption Figures References

Soft X-ray Fluorescence Study of Buried Silicides in Antiferromagnetically Coupled Fe/Si Multilayers

J.A. Carlisle, A. Chaiken, R.P. Michel, and L.J. Terminello
Materials Science and Technology Division
Lawrence Livermore National Lab
Livermore, CA 94551

J.J. Jia and T.A. Calcott
University of Tennessee
Knoxville, TN 37996

D.L. Ederer
Tulane University
New Orleans, LA 70118

Published as Phys. Rev. B 53, R8824(1996).

This work is also featured in ALS newsletter regular articles and news.


Soft x-ray fluorescence spectroscopy has been employed to obtain information about the Si-derived valence band states of Fe/Si multilayers. The valence band spectra are quite different for films with and without antiferromagnetic interlayer exchange coupling, demonstrating that these multilayers have different silicide phases in their spacer layers. Comparison with previously published fluorescence data on bulk iron silicides shows that the Fe concentration in the silicide spacer layers is substantial. Near-edge x-ray absorption data on antiferromagnetically coupled multilayers in combination with the fluorescence data demonstrate unambiguously that the silicide spacer layer in these films is metallic. These results on the electronic structure of buried layers in a multilayer film exemplify the wide range of experiments made possible by new high-brightness synchrotron sources. (Alison Chaiken)
Sun Dec 17 20:43:50 PST 1995