Optical study of a phase coexistence in KHCO3

The nature of the phase boundary between ferroelastic domains which coexist with the monoclinic phase of KHCO3 below Tc = 318K is investigated by means of anisotropic refraction of light in the crystal. This interface whose orientation is measured with a precision of ∼ 0.2 degree is shown to corresp...

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Bibliographic Details
Published in:Ferroelectrics 1999-09, Vol.233 (1), p.37-49
Main Authors: Rouede, D., Le Grand, Y., Wienold, J., Glinnemann, J.
Format: Article
Language:English
Subjects:
domain
domain wall
Ferroelastic
phase coexistence
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Summary:The nature of the phase boundary between ferroelastic domains which coexist with the monoclinic phase of KHCO3 below Tc = 318K is investigated by means of anisotropic refraction of light in the crystal. This interface whose orientation is measured with a precision of ∼ 0.2 degree is shown to correspond to a W'-wall of the ferroelastic domain-wall theory. This allows us to conclude that the observed domains consist of a triclinic phase.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150199908016994