Spontaneous strain and the ferroelastic phase transition in As2O5

S. A.T. Redfern; E. Salje

doi:10.1088/0022-3719/21/2/011

Spontaneous strain and the ferroelastic phase transition in As₂O₅

S. A.T. Redfern, E. Salje

University of Cambridge

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The tetragonal-orthorhombic phase transition in arsenic pentoxide has been studied by X-ray powder diffraction and is found to be a proper ferroelastic transition. The spontaneous strain behaves as the order parameter following Landau theory with ε_s varies as |T_c-T| ^β,β=½, T_c=578 K. The order parameter susceptibility has been determined from line broadening and follows | T_c-T |^-y, gamma =1. No deviation from Landau behavior has been observed experimentally.

Original language	English
Pages (from-to)	277-285
Number of pages	9
Journal	Journal of Physics C: Solid State Physics
Volume	21
Issue number	2
DOIs	https://doi.org/10.1088/0022-3719/21/2/011
Publication status	Published - Jan 20 1988
Externally published	Yes

ASJC Scopus Subject Areas

Condensed Matter Physics
General Engineering
General Physics and Astronomy

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10.1088/0022-3719/21/2/011

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N2 - The tetragonal-orthorhombic phase transition in arsenic pentoxide has been studied by X-ray powder diffraction and is found to be a proper ferroelastic transition. The spontaneous strain behaves as the order parameter following Landau theory with εs varies as |Tc-T| β,β=½, Tc=578 K. The order parameter susceptibility has been determined from line broadening and follows | Tc-T |-y, gamma =1. No deviation from Landau behavior has been observed experimentally.

AB - The tetragonal-orthorhombic phase transition in arsenic pentoxide has been studied by X-ray powder diffraction and is found to be a proper ferroelastic transition. The spontaneous strain behaves as the order parameter following Landau theory with εs varies as |Tc-T| β,β=½, Tc=578 K. The order parameter susceptibility has been determined from line broadening and follows | Tc-T |-y, gamma =1. No deviation from Landau behavior has been observed experimentally.

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Spontaneous strain and the ferroelastic phase transition in As₂O₅

Abstract

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