Analysis of the dielectric constant, spontaneous polarization and the coersive field close to the phase transitions in ferroelectric K2CoCl4
FERROELECTRICS, vol.504, no.1, pp.15-21, 2016 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 504 Issue: 1
- Publication Date: 2016
- Doi Number: 10.1080/00150193.2016.1238707
- Journal Name: FERROELECTRICS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.15-21
- Keywords: Ferroelectricity, dielectric constant, spontaneous polarization, coersive field, K2CoCl4, COMMENSURATE TRANSITION, X-RAY, K2ZNBR4, K2ZNCL4, K2COBR4
- Van Yüzüncü Yıl University Affiliated: Yes
Abstract
Temperature dependence of the dielelctric constant epsilon(a) along a axis and the spontaneous polarization P-S is analyzed near the ferroelectric transition (T-C = 182 degrees C) in K2CoCl4. The power-law formula is used for the analysis of the observed data from the literature. Critical exponents we determine from our analysis indicate that K2CoCl4 exhibits a weak first order transition. Coercive field EC is also analyzed using the experimental data which decreases smoothly as the temperature increases toward the transition temperature T-C. It is concluded that the theoretical model(s) with the non-zero applied electric field, can explain the ferroelectric properties of K2CoCl4 close to the phase transitions.