Temperature evolution of the ferroelastic order parameter of As2O5as determined from optical birefringence
- 30 August 1987
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 20 (24), 3613-3620
- https://doi.org/10.1088/0022-3719/20/24/004
Abstract
The temperature evolution of the optical birefringence of ferroelastic arsenic pentoxide is shown to reflect the order parameter behaviour in the temperature interval from 300 K to Tc=575.7 K. The phase transition is second order and the critical exponent of the order parameter is 0.509 (10); deviations from mean-field behaviour were found at temperatures closer than 5 K to Tc.Keywords
This publication has 14 references indexed in Scilit:
- Raman scattering near the structural phase transition of As2O5: order parameter treatmentJournal of Physics C: Solid State Physics, 1986
- Raman spectroscopic investigation of the order parameter behaviour in hypersolvus alkali feldspar: Displacive phase transition and evidence for Na-K site orderingPhysics and Chemistry of Minerals, 1986
- Phase transitions in langbeinites II: Raman spectroscopic investigations of K2Cd2(SO4)3Physics and Chemistry of Minerals, 1986
- Phase transition in K2Cd2(SO4)3: investigation of the non-linear dependence of spontaneous strain and morphic birefringence on order parameter as determined from excess entropy measurementsJournal of Physics C: Solid State Physics, 1984
- Specific-heat measurements and critical exponents of the ferroelastic phase transition in andPhysical Review B, 1983
- Reinvestigation of the stepwise character of the ferroelastic phase transition in lead phosphate-arsenate, Pb3(PO4) 2 -Pb3(AsO4)2Journal de Physique, 1982
- How accurate was the carat?Nature, 1979
- On the observation of critical indices of primary and secondary order parameters using birefringenceJournal of Physics C: Solid State Physics, 1977
- Acoustic phonon instabilities and structural phase transitionsPhysical Review B, 1976
- Determination of the State Parameters and Formulation of Spontaneous Strain for FerroelasticsJournal of the Physics Society Japan, 1970