RT Journal Article
T1 Exploring multiferroicity in BiFeO3 - NaNbO3 thermistor electroceramics
A1 Giraldo, David
A1 Almodóvar Losada, Paloma
A1 López García, María Luisa
A1 Rodriguez Aguado, Elena
A1 Rodriguez Castellon, Enrique
A1 Galdamez, Antonio
A1 Álvarez Serrano, Inmaculada
AB The 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.
PB Elsevier
SN 0955-2219
YR 2021
FD 2021-07-24
LK https://hdl.handle.net/20.500.14352/113236
UL https://hdl.handle.net/20.500.14352/113236
LA eng
NO D. 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, 7069-7076
NO Ministerio de Economía, Comercio y Empresa
NO Ministerio de Ciencia, Innovación  y Universidades
NO Universidad Complutense de Madrid
NO Junta de Andalucía
DS Docta Complutense
RD 8 abr 2025