Investigations on Fe lattice strain relaxation in the Al/Fe/Al trilayer

Abstract

We have measured polarization-dependent Fe K-edge XAFS spectra from an epitaxially-grown Al/Fe/Al/ZnSe/GaAs(001) sample using synchrotron radiation. The Fourier-transformed XAFS spectra were fit up to four coordination shells simultaneously using theoretical spectra generated with FEFF 6. Our results reveal a small tetragonal distortion of the bcc α-Fe film lattice towards a contraction in the film growth direction (c = 2.863 angstroms and a = 2.874 angstroms; bulk a = 2.867 angstroms). The anomalous tetragonal distortion is consistent with a model involving substantial interdifussion of Fe and Al, leading to Fe1-xAlx alloy formation localized in the interface regions.

Department(s)

Physics, Astronomy, and Materials Science

Document Type

Article

DOI

https://doi.org/10.1557/proc-437-27

Publication Date

1-1-1996

Journal Title

Materials Research Society Symposium Proceedings

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