Abstract
Ferroelectric hysteresis and aging effects in multiferroic Pb(Fe0.5Nb0.5)O3 ceramics obtained through different precursors are discussed using the hysteresis loop modeling by equivalent circuit. Maximum polarization Pmax, remanent polarization Pr, and coercive field EC as functions of external electric fields are determined. A comparative analysis of Pmax, Pr, and EC parameters obtained from the full and remanent hysteresis loops is presented and correlated with a previous structural, morphological, and small signal dielectric frequency-temperature response study using the impedance spectroscopy technique. Three contributions to the full hysteresis were identified: first, a dipolar contribution; second, space charge movement; and third, orientation of the switchable ferroelectric domains. The smaller contribution of the switchable ferroelectric domains, in contrast to the high polarizability of the compound, is explained by assuming that the grains have a complex inner polydomain structure with a distribution of submicrometric sizes and random orientations. Differences in the dielectric hysteresis and aging behavior between the PFN samples obtained through different precursors are established according to their morphological features and their domain structure inside the grains.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
