Phase Transitions and Electrocaloric Effect in Ca-Modified Na1/2Bi1/2TiO3–SrTiO3–PbTiO3 Solid Solutions
- Resource Type
- Periodical
- Authors
- Dunce, M.; Birks, E.; Perantie, J.; Hagberg, J.; Antonova, M.; Sternberg, A.
- Source
- IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control IEEE Trans. Ultrason., Ferroelect., Freq. Contr. Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on. 61(8):1364-1367 Aug, 2014
- Subject
- Fields, Waves and Electromagnetics
Temperature dependence
Temperature measurement
Solids
Temperature
Dielectrics
Relaxor ferroelectrics
Polarization
- Language
- ISSN
- 0885-3010
1525-8955
The electrocaloric effect as a function of Ca concentration is studied in 0.4Na 1/2 Bi 1/2 TiO 3 –(0.4– x )SrTiO 3 –0.2PbTiO 3 – x CaTiO 3 . Weak influence of Ca at low concentrations corresponds to the previously established concentration dependence of phase transition temperature and polarization, whereas the decrease of electrocaloric effect at phase transition at higher concentrations of Ca can be explained by assuming increasing concentration of polar nanoregions. The role of thermal depoling in the case of electric-field-induced phase transition is shown.