DocumentCode
1287271
Title
Coexistence of ferroelectric and relaxor states in Ba2PrxNd1-xFeNb4O15
Author
Kinka, Martynas ; Josse, Michael ; Castel, Elias ; Bagdzevicius, Sarunas ; Samulionis, Vytautas ; Grigalaitis, Robertas ; Banys, Juras ; Maglione, Mario
Author_Institution
Fac. of Phys., Vilnius Univ., Vilnius, Lithuania
Volume
59
Issue
9
fYear
2012
fDate
9/1/2012 12:00:00 AM
Firstpage
1879
Lastpage
1882
Abstract
We have investigated the dielectric response of Ba2PrxNd1-xFeNb4O15 ceramics (x = 0, 0.2, 0.5, 0.6, 0.8, 1) in the frequency range from 20 Hz to 1 GHz. The obtained results confirmed the continuous transformation from the ferroelectric behavior of Ba2NdFeNb4O15 to the pure relaxor response of Ba2PrFeNb4O15 with increasing x. For intermediate x values, coexisting ferroelectric transition and relaxor dielectric signatures were observed, corresponding to two different phenomena in the framework of these materials. Increasing the amount of Pr decreases the ferroelectric phase transition temperatures in these ceramics; a large cooling-heating hysteresis exceeding 50K was also observed.
Keywords
barium compounds; cooling; dielectric hysteresis; ferroelectric ceramics; ferroelectric transitions; heat treatment; iron compounds; neodymium compounds; praseodymium compounds; relaxor ferroelectrics; Ba2PrxNd1-xFeNb4O15; ceramics; cooling-heating rate hysteresis; dielectric properties; ferroelectric phase transition temperatures; ferroelectric-relaxor state coexistence; frequency 20 Hz to 1 GHz; relaxor dielectric signatures; Ceramics; Dielectrics; Heating; Hysteresis; Permittivity; Solids; Tungsten;
fLanguage
English
Journal_Title
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
Publisher
ieee
ISSN
0885-3010
Type
jour
DOI
10.1109/TUFFC.2012.2400
Filename
6306002
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