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Interfacial Structure of Lattice Mismatched bcc(110)/bcc(110) Transition Metal Superlattices

Published online by Cambridge University Press:  15 February 2011

Eric E. Fullerton
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne IL 60439
S. M. Mini
Affiliation:
Advanced Photon Source, Argonne National Laboratory, Argonne IL 60439
A. S. Bommannavar
Affiliation:
Brooklyn College of CUNY, Brooklyn, NY 11210
C. H. Sowers
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne IL 60439
S. N. Ehrlich
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, IN 47907
S. D. Bader
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne IL 60439
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Abstract

We present structural characterizations of a series of sputtered Fe/Nb and V/Nb superlattices by high-angle x-ray diffraction. Diffraction scans were performed with the scattering vector at various angles (χ) with respect to the layers. χ=0° diffraction spectra (normal to the layers) were fitted to a general structural model to determine the (110) lattice strains, interfacial disorder and interdiffusion. χ>0° spectra probe the lattice strain of the individual layers and the in-plane interfacial coherence. Both systems form incoherent interfaces above a critical modulation wavelength (ΛC). At ΛC, the Fe/Nb system undergoes a crystalline-to-amorphous transition while the V/Nb forms in-plane coherent interfaces.

Type
Research Article
Copyright
Copyright © Materials Research Society 1993

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