Evaluation of curie constants of ferroelectric crystals from pyroelectric response
- 1 January 1974
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 7 (1) , 171-173
- https://doi.org/10.1080/00150197408237985
Abstract
A method is described for determining the Curie constant (Cc) of ferroelectric crystals below the Curie temperature (Tc) from the pyioelectric response. It is shown from Devonshire's phenomenological theory of ferroelectricity that the material parameter (p/ϵ) of the pyroelectric response is given by p/ϵ =PS/Cc , where Ps is the spontaneous polarization. This relationship is tested in detail for Sr0.5Ba0.5Nb2O6 crystals. The value of Cc obtained from the Curie-Weiss law, ϵ = CC /(T - Tc ), which is valid above Tc , is compared to the value of Cc obtained below Tc for SBN and other ferroelectric crystals and reasonable agreement is observed.Keywords
This publication has 8 references indexed in Scilit:
- Preparations and properties of low loss Sr1−xBaxNb2O6 ferroelectric single crystalsJournal of Electronic Materials, 1973
- Pyroelectric coefficient direct measurement technique and application to a nsec response time detectorFerroelectrics, 1972
- The pyroelectric properties of the lanthanum-doped ferroelectric plzt ceramicsFerroelectrics, 1972
- Investigation of the Electrical Properties of Sr1−xBaxNb2O6 with Special Reference to Pyroelectric DetectionJournal of Applied Physics, 1969
- FERROELECTRIC Sr1−xBaxNb2O6 AS A FAST AND SENSITIVE DETECTOR OF INFRARED RADIATIONApplied Physics Letters, 1968
- Dielectric, Thermal, and Pyroelectric Properties of Ferroelectric LiTaPhysical Review B, 1968
- Dynamic Method for Measuring the Pyroelectric Effect with Special Reference to Barium TitanateJournal of Applied Physics, 1956
- Theory of ferroelectricsAdvances in Physics, 1954