| Issue |
EPL
Volume 104, Number 3, November 2013
|
|
|---|---|---|
| Article Number | 36004 | |
| Number of page(s) | 4 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/104/36004 | |
| Published online | 05 December 2013 | |
Critical exponents for anisotropic thermal expansion at ferroelectric Curie temperatures: Evidence for defect mechanisms
Department of Physics, Cavendish Laboratory, Cambridge University - Cambridge CB3 0HE, UK
Received: 16 August 2013
Accepted: 7 November 2013
The defect dynamical model of Sigov and Levanyuk is used to analyze a heretofore unsolved problem in ferroelectricity: the temperature change of anisotropic thermal expansion along the polar axis. For brominated tris-sarcosine calcium chloride a new expansion exponent 
in reduced temperature 
is found, in agreement with the Sigov-Levanyuk theoretical value, under the assumption that the change in thermal diffusion is proportional to the change in thermal expansion near Tc.
PACS: 64.60.fd – General theory of critical region behavior / 77.80.B- – Phase transitions and Curie point / 77.84.Fa – KDP- and TGS-type crystals
© EPLA, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.