Highly Tunable Relaxors Developed from Antiferroelectrics

) at 10 kHz, outcompeting most traditional relaxor ferroelectric films. This high tunability is sustained in the radio-frequency range, resulting in a high commutation quality factor (>2000 at 1 GHz). This work highlights the phase evolution from antiferroelectrics (with lower, "positive" dielectric tunability) to relaxors (with higher, "negative" tunability), underscoring a promising approach to develop relaxors with enhanced functional capabilities and new possibilities.