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 :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=109798
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