Investigations on Fe lattice strain relaxation in the Al/Fe/Al trilayer
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.
Physics, Astronomy, and Materials Science
Mayanovic, Robert A., Carlos J. Gutierrez, and Gary A. Prinz. "Investigations on Fe lattice strain relaxation in the Al/Fe/Al trilayer." MRS Online Proceedings Library (OPL) 437 (1996).
Materials Research Society Symposium Proceedings