The shear stiffness in the incommensurate phase of A2BX4-type crystals
- 1 February 1983
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 46 (1), 19-24
- https://doi.org/10.1080/00150198208225306
Abstract
Analytic formula for the shear stiffness c55 of A2BX4-type crystals is derived in the domain-like regime near the phase transition temperature Tc from the incommensurate into commensurate ferroelectric phase. The anomalous part of c55 is shown to be proportional to the domain wall density. A comparison with the dielectric susceptibility χ3 is made. Theoretical and experimental temperature dependences of c55 in K3SeO4 are discussed.Keywords
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