Tailoring high-energy storage NaNbO₃-based materials from antiferroelectric to relaxor states

Reversible field-induced phase transitions define antiferroelectric perovskite oxides and lay the foundation for high-energy storage density materials, required for future green technologies. However, promising new antiferroelectrics are hampered by transition´s irreversibility and low electrical resistivity. Here, we demonstrate an approach...

Na-23 NMR Spectroscopic Quantification of the Antiferroelectric-Ferroelectric Phase Coexistence in Sodium Niobate

The irreversible field-induced phase transition between the antiferroelectric (P) and ferroelectric (Q) polymorphs of sodium niobate (NaNbO 3) ceramics constitutes a focal point in improving the material’s energy storage properties. The coexistence of P and Q phases can be verified by X-ray and electron diffraction methods, but its extent...

Design of lead-free antiferroelectric (1 − X)NaNbO₃−xSrSnO₃ compositions guided by first-principles calculations

Antiferroelectric materials exhibit a unique electric-field-induced phase transition, which enables their use in energy storage, electrocaloric cooling, and nonvolatile memory applications. However, in many prototype antiferroelectrics this transition is irreversible, which prevents their implementation. In this work, we demonstrate a general...