DocumentCode
109798
Title
Phase Transitions and Electrocaloric Effect in Ca-Modified Na1/2Bi1/2TiO3–SrTiO3–PbTiO3 Solid Solutions
Author
Dunce, Marija ; Birks, Eriks ; Perantie, Jani ; Hagberg, Juha ; Antonova, Maija ; Sternberg, Andris
Author_Institution
Inst. of Solid State Phys., Univ. of Latvia, Riga, Latvia
Volume
61
Issue
8
fYear
2014
fDate
Aug-14
Firstpage
1364
Lastpage
1367
Abstract
The electrocaloric effect as a function of Ca concentration is studied in 0.4Na1/2Bi1/2TiO3-(0.4-x)SrTiO3-0.2PbTiO3-xCaTiO3. 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.
Keywords
bismuth compounds; calcium compounds; dielectric polarisation; ferroelectric transitions; lead compounds; pyroelectricity; sodium compounds; strontium compounds; Ca concentration function; Ca-modified solid solutions; Na0.5Bi0.5TiO3-SrTiO3-PbTiO3-CaTiO3; electric-field-induced phase transition temperature; electrocaloric effect; polar nanoregions; polarization; thermal depoling; Dielectrics; Polarization; Relaxor ferroelectrics; Solids; Temperature; Temperature dependence; Temperature measurement;
fLanguage
English
Journal_Title
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
Publisher
ieee
ISSN
0885-3010
Type
jour
DOI
10.1109/TUFFC.2014.3044
Filename
6863858
Link To Document