Well-defined double hysteresis loop in NaNbO₃ antiferroelectrics.

ABSTRACT: Antiferroelectrics (AFEs) are promising candidates in energy-storage capacitors, electrocaloric solid-cooling, and displacement transducers. As an actively studied lead-free antiferroelectric (AFE) material, NaNbO₃ has long suffered from its ferroelectric (FE)-like polarization-electric field (P-E) hysteresis loops with high remnant polarization and large hysteresis. Guided by theoretical calculations, a new strategy of reducing the oxygen octahedral tilting angle is proposed to stabilize the AFE P phase (Space group Pbma) of NaNbO₃. To validate this, we judiciously introduced CaHfO₃ with a low Goldschmidt tolerance factor and AgNbO₃ with a low electronegativity difference into NaNbO₃, the decreased cation displacements and [BO_6</

SUBMITTER: Luo N 

PROVIDER: S-EPMC10063644 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature