Colossal and tunable dielectric tunability in domain-engineered barium strontium titanate.

ABSTRACT: Realization of tunable materials that are multifunctional and maintain high performance in dynamically changing environments is a fundamental goal of science and engineering. Tunable dielectrics form the basis of a wide variety of communication and sensing devices and require breakthrough performance improvement to enable next-generation technologies. Using phenomenological modeling, film growth, and characterization, we show that devices consisting of domain-wall-rich Ba_0.8Sr_0.2TiO₃ films close to a polar-domain-variant phase boundary exhibit colossal dielectric tunability of 100:1 (99%) at a voltage (electric field) of ~15 V (750 kV/cm), resulting in a tunability-quality factor product figure of merit that rises to nearly 10⁵, two orders of mag

SUBMITTER: Chen D 

PROVIDER: S-EPMC12475157 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature