Coexistence of ferroelectric and relaxor states in Ba2PrxNd1-xFeNb4O15
Langue
en
Article de revue
Ce document a été publié dans
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 2012, vol. 59, n° 9, p. 1879-1882
Institute of Electrical and Electronics Engineers
Résumé en anglais
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 ...Lire la suite >
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.< Réduire
Mots clés en anglais
Dielectric
Ceramics
Ferroelectricity
Origine
Importé de halUnités de recherche