Giraldo, DavidAlmodóvar Losada, PalomaLópez García, María LuisaRodriguez Aguado, ElenaRodriguez Castellon, EnriqueGaldamez, AntonioÁlvarez Serrano, Inmaculada2025-01-082025-01-082021-07-24D. Giraldo, P. Almodóvar, M.L. López, E. Rodríguez-Aguado, E. Rodríguez-Castellón, A. Galdámez, I. Álvarez-Serrano, Exploring multiferroicity in BiFeO3 - NaNbO3 thermistor electroceramics, Journal of the European Ceramic Society, 41, (14), 2021, 7069-70760955-221910.1016/j.jeurceramsoc.2021.07.045https://hdl.handle.net/20.500.14352/113236The BiFeO3 –NaNbO3 electroceramics, synthesized by the ceramic method, are studied aiming to obtain materials with a well-defined thermistor response coexisting with a relevant magnetic response. XRD data and Raman analysis reveal a structural transition as a function of composition. Compositional features explored from ICP, XPS and EDS measurements, suggest compositional heterogeneity leading to a cluster-type scenario implying NNO-rich and BFO-rich regions in the samples. Impedance spectroscopy data reveal the development of a PTCR thermistor response for x ≥ 0.5 near room temperature. The x = 0.9 ceramic shows resistivity changes of about six orders of magnitude in the first thermal cycle and maximum permittivity values of ∼ 105, much higher than those previously reported for BFO-doped ceramics. Magnetization data are interpreted in terms of the stabilization of superparamagnetic clusters. The response displayed by the x = 0.9 ceramic makes it a promising multifunctional material for device applications.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal articlehttps://doi.org/10.1016/j.jeurceramsoc.2021.07.045https://www.sciencedirect.com/science/article/pii/S095522192100515Xopen access546DielectricsSodium niobateBismuth ferritePTCRMultiferroicsCiencias23 Química