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Effect of Stress on Coherently Grown Au-Ni (001) Solid Solutions

Published online by Cambridge University Press:  10 February 2011

G. Abadias ,
V. Gehanno ,
A. Marty ,
B. Gilles  and
M. Dynna
G. Abadias
Affiliation:
CEA-Grenoble, Département de Recherche Fondamentale sur la Matière Condensée, SP2M/NM, 38054 Grenoble cédex 09, France
V. Gehanno
Affiliation:
CEA-Grenoble, Département de Recherche Fondamentale sur la Matière Condensée, SP2M/NM, 38054 Grenoble cédex 09, France
A. Marty
Affiliation:
CEA-Grenoble, Département de Recherche Fondamentale sur la Matière Condensée, SP2M/NM, 38054 Grenoble cédex 09, France
B. Gilles
Affiliation:
LTPCM, ENSEEG, BP 75, 38042 Saint-Martin d'Héres, France
M. Dynna
Affiliation:
Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7
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Abstract

The effect of epitaxial stress on the stability of Au-Ni solid solutions grown by MBE on Au(001) is investigated. Experimental studies (TEM, GIXD) have shown that the elastic energy of the AuNi alloys is relaxed via two competing ways: twinning and an ordering process in which pseudo-periodic antiphase structures based on the L10 unit cell are found. The stabilisation of a metastable ordered L10 phase in the stressed Au-Ni system is explained using thermodynamic calculations based on the minimisation of free energy including elastic contributions.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 441: Thin Films – Structure and Morphology , 1996 , 439
Copyright
Copyright © Materials Research Society 1997

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