Coexistence of ferroelectric and relaxor states in Ba2PrxNd1-xFeNb4O15

Martynas Kinka; Michael Josse; Elias Castel; Sarunas Bagdzevicius; Vytautas Samulionis; Robertas Grigalaitis; Juras Banys; Mario Maglione

doi:10.1109/TUFFC.2012.2400

Coexistence of ferroelectric and relaxor states in Ba2PrxNd1-xFeNb4O15

IEEE Trans Ultrason Ferroelectr Freq Control. 2012 Sep;59(9):1879-82. doi: 10.1109/TUFFC.2012.2400.

Authors

Martynas Kinka¹, Michael Josse, Elias Castel, Sarunas Bagdzevicius, Vytautas Samulionis, Robertas Grigalaitis, Juras Banys, Mario Maglione

Affiliation

¹ Faculty of Physics, Vilnius University, Vilnius, Lithuania. martynas.kinka@delfi.lt

PMID: 23007754
DOI: 10.1109/TUFFC.2012.2400

Abstract

We have investigated the dielectric response of Ba(2)Pr(x)Nd(1-x)FeNb(4)O(15) 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 Ba(2)PrFeNb(4)O(15) 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.

Publication types

Research Support, Non-U.S. Gov't