On the coexistence of ferroelectric and antiferroelectric polymorphs in NaNbO fibers at room temperature

Teixeira, Guilhermina Ferreira; Seleghini, Heitor Secco; Bastos, Wagner Benício; Jacomaci, Natalia; Stojadinović, Bojan; Dohčević-Mitrović, Zorana; Colmati Junior, Flavio; Miguel Barrera, Miguel Angel San

On the coexistence of ferroelectric and antiferroelectric polymorphs in NaNbO fibers at room temperature

Data

2023

Autores

Teixeira, Guilhermina Ferreira

Seleghini, Heitor Secco

Bastos, Wagner Benício

Jacomaci, Natalia

Stojadinović, Bojan

Dohčević-Mitrović, Zorana

Colmati Junior, Flavio

Miguel Barrera, Miguel Angel San

Resumo

Na2Nb2O6·H2O fibers were synthesized in a short time using a microwave-assisted hydrothermal method and later used as a precursor for obtaining NaNbO3 fibers with piezoelectric characteristics. The NaNbO3 fibers consist of a mix of antiferroelectric (Pbcm) and ferroelectric (P21ma) orthorhombic phases. The ferroelectric structure comprises about 87% wt of the sample, and a theoretical approach indicated that an electric field could induce an inversion in the relative stability between the most stable antiferroelectric structure and the ferroelectric one. Piezoresponse force microscopy showed that an individual fiber is composed of regions with ferroelectric domains and regions with no ferroelectric characteristics.

Citação

TEIXEIRA, Guilhermina Ferreira et al. On the coexistence of ferroelectric and antiferroelectric polymorphs in NaNbO fibers at room temperature. Journal of Materials Chemistry C, London, v. 11, n. 16, p. 5524-5533, 2023. DOI: 10.1039/D2TC04039E. Disponível em: https://pubs.rsc.org/en/content/articlelanding/2023/TC/D2TC04039E. Acesso em: 12 dez. 2023.