Identification of an incommensurate FeAl{sub 2} overlayer on FeAl(110) using x-ray diffraction and reflectivity [electronic resource].

Published: Washington, D.C. : United States. Dept. of Energy, 1995.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: 12 pages : digital, PDF file
Additional Creators: Oak Ridge National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

FeAl, like NiAl, crystallizes in the CsCl structure. Consequently the (110) planes contain equal amounts of Fe and Al distributed as interlocking rectangles. Unlike the NiAI(110) surface, which retains the (1×l) in-plane symmetry of the bulk, FeAl(l10) reconstructs to form an ordered, incommensurate overlayer. The reconstructed layer introduces x-ray diffraction rods at half-order positions along the [1{bar 1}0] direction, and displaced ±0.2905 from integer positions along the [001] direction. Peak widths reveal excellent long range order. Specular reflectivity measurements above and below the Fe Kα edge can be reproduced using a model containing a single reconstructed overlayer with an Fe:Al ratio of 1:2, consistent with FeA{sub I}2.

Report Numbers

E 1.99:conf-9506314--3
conf-9506314--3

Subject(s)

Materials Science

Other Subject(s)

Note

Published through SciTech Connect.
06/30/1995.
"conf-9506314--3"
"DE96005740"
4. international conference on surface x-ray and neutron scattering, Lake Geneva, WI (United States), 25-30 Jun 1995.
Baddorf, A.P.; Chandavarkar, S.S.

Funding Information

AC05-84OR21400

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