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Ion Beam Mixing of Alternate Layers Of Ni-Nb and Ni-Cr

Published online by Cambridge University Press:  26 February 2011

A. K. Rai ,
R. S. Bhattacharya ,
M. H. Rashid  and
A. W. McCormick
A. K. Rai
Affiliation:
Universal Energy Systems, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432
R. S. Bhattacharya
Affiliation:
Universal Energy Systems, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432
M. H. Rashid
Affiliation:
Universal Energy Systems, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432
A. W. McCormick
Affiliation:
Universal Energy Systems, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432
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Abstract

Alternating layers of Ni and Nb with a total thickness of 1060Å, and Ni and Cr with a total thickness of 840Å were deposited by electron beam evaporation on silicon. The individual layer thicknesses were adjusted in such a way as to obtain 50/50 at% compositions of Ni-Nb and Ni-Cr; the thicknesses were around 100Å for Ni and 170Å for Nb, and 100Å of Ni and 110Å of Cr. The films were bombarded with 350 keV Cr+ ions at a dose of 2 × 10 ions cm. RBS and TEM techniques were used to study the mixing and microstructure. Almost complete mixing and amorphization have been observed for the Ni-Nb system. Ni-Cr film has revealed very little mixing compared to Ni-Nb film and the microstructure remained polycrystalline. Sputter (rf) deposited Ni-Cr film also remained polycrystalline both before and after ion irradiation. The Ni-Cr System appears to be an exception to the structural difference rule for amorphous phase formation by ion irradiation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 54: Symposium E – Thin Films–Interfaces and Phenomena , 1985 , 231
Copyright
Copyright © Materials Research Society 1986

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References

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