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Title: Competition between Order and Phase Separation in Au-Ni

Abstract

We have measured and theoretically analyzed the diffuse scattering in the binary alloy system Au-Ni, which has been proposed as a testing ground for theories of alloy phase stability. We found strong evidence that in the alloys Au{sub 3}Ni and Au{sub 3}Ni{sub 2}, fluctuations of both ordering- and clustering-type are competing with each other. Our results resolve a long-standing controversy on the balance of relaxation and mixing energies in this alloy system and explain recent findings of ordering in thin Au-Ni films.

Authors:
; ; ; ; ;  [1];  [1];  [2];  [3];  [4];  [5]
  1. Max-Planck-Institut fuer Metallforschung, Heisenbergstrasse 3, D-70569 Stuttgart (Germany)
  2. (Germany)
  3. Northwestern University, Evanston, Illinois 60208 (United States)
  4. Department of Materials, University of Oxford, Oxford OX1 3PH (United Kingdom)
  5. European Synchrotron Radiation Facility, F-38043 Grenoble (France)
Publication Date:
OSTI Identifier:
20699659
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 95; Journal Issue: 23; Other Information: DOI: 10.1103/PhysRevLett.95.235703; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BINARY ALLOY SYSTEMS; DIFFUSE SCATTERING; GOLD ALLOYS; NICKEL ALLOYS; ORDER-DISORDER TRANSFORMATIONS; PHASE STABILITY; X-RAY DIFFRACTION

Citation Formats

Reichert, H., Schoeps, A., Ramsteiner, I.B., Bugaev, V.N., Shchyglo, O., Udyansky, A., Dosch, H., Universitaet Stuttgart, Institut fuer Theoretische und Angewandte Physik, D-70569 Stuttgart, Asta, M., Drautz, R., and Honkimaeki, V. Competition between Order and Phase Separation in Au-Ni. United States: N. p., 2005. Web. doi:10.1103/PhysRevLett.95.235703.
Reichert, H., Schoeps, A., Ramsteiner, I.B., Bugaev, V.N., Shchyglo, O., Udyansky, A., Dosch, H., Universitaet Stuttgart, Institut fuer Theoretische und Angewandte Physik, D-70569 Stuttgart, Asta, M., Drautz, R., & Honkimaeki, V. Competition between Order and Phase Separation in Au-Ni. United States. doi:10.1103/PhysRevLett.95.235703.
Reichert, H., Schoeps, A., Ramsteiner, I.B., Bugaev, V.N., Shchyglo, O., Udyansky, A., Dosch, H., Universitaet Stuttgart, Institut fuer Theoretische und Angewandte Physik, D-70569 Stuttgart, Asta, M., Drautz, R., and Honkimaeki, V. Fri . "Competition between Order and Phase Separation in Au-Ni". United States. doi:10.1103/PhysRevLett.95.235703.
@article{osti_20699659,
title = {Competition between Order and Phase Separation in Au-Ni},
author = {Reichert, H. and Schoeps, A. and Ramsteiner, I.B. and Bugaev, V.N. and Shchyglo, O. and Udyansky, A. and Dosch, H. and Universitaet Stuttgart, Institut fuer Theoretische und Angewandte Physik, D-70569 Stuttgart and Asta, M. and Drautz, R. and Honkimaeki, V.},
abstractNote = {We have measured and theoretically analyzed the diffuse scattering in the binary alloy system Au-Ni, which has been proposed as a testing ground for theories of alloy phase stability. We found strong evidence that in the alloys Au{sub 3}Ni and Au{sub 3}Ni{sub 2}, fluctuations of both ordering- and clustering-type are competing with each other. Our results resolve a long-standing controversy on the balance of relaxation and mixing energies in this alloy system and explain recent findings of ordering in thin Au-Ni films.},
doi = {10.1103/PhysRevLett.95.235703},
journal = {Physical Review Letters},
number = 23,
volume = 95,
place = {United States},
year = {Fri Dec 02 00:00:00 EST 2005},
month = {Fri Dec 02 00:00:00 EST 2005}
}