Anti-isostructural phases and anomalous thermoelasticity in In-based alloys: Synchrotron x-ray diffraction experiments and unified phenomenological model

Dmitriev, V.P.;Chernyshov, D.;Filinchuk, Yaroslav;Degtyareva, V.F.
(2007) Physical Review B - Condensed Matter and Materials Physics — Vol. 75, n° 2, p. 1-8 (2007)

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Authors
  • Dmitriev, V.P.
    Author
  • Chernyshov, D.
    Author
  • Filinchuk, YaroslavUCLouvain
    Author
  • Degtyareva, V.F.
    Author
Abstract
A combined in situ high-temperature high-pressure synchrotron radiation diffraction study has been carried out on In alloys with Cd, Pb, and Sn. Anti-isostructural phase transitions between structures with opposite signs of tetragonal distortion, found earlier in In-Pb, have also been observed in In-Sn alloys. We show that negative thermal expansion of In and some of the In alloys is a phase-dependent effect resulting from a competition between spontaneous strain induced by a proper ferroelastic transformation and normal thermal expansion. A unified phenomenological model has been worked out for structural phase transitions in In and its alloys. © 2007 The American Physical Society.
Affiliations
  • ESRF, Grenoble (France)Chimie

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Dmitriev, V. P., Chernyshov, D., Filinchuk, Y., & Degtyareva, V. F. (2007). Anti-isostructural phases and anomalous thermoelasticity in In-based alloys: Synchrotron x-ray diffraction experiments and unified phenomenological model. Physical Review B - Condensed Matter and Materials Physics, 75(2), 1-8. https://doi.org/10.1103/PhysRevB.75.024111 (Original work published 2007)