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Journal article
Colossal and tunable dielectric tunability in domain-engineered barium strontium titanate
Nature communications, v 16(1), 8486
26 Sep 2025
PMID: 41006300
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 BaSrTiOfilms 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 10, two orders of magnitude higher than the best previous reported values. Remarkably, varying the amplitude of alternating-current bias enables modulation of this tunability by 50%, owing to domain-wall motion. These results suggest that domain engineering is a powerful approach for achieving excellent modulation of functional properties in ferroelectric films.
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Details
- Title
- Colossal and tunable dielectric tunability in domain-engineered barium strontium titanate
- Creators
- Dongfang Chen - Drexel UniversitySergey Nisnevich - Drexel UniversityLiyan Wu - Drexel UniversityZongquan Gu - Drexel UniversityJohn Carroll - Drexel UniversityYizhe Jiang - University of California, BerkeleyCedric J G Meyers - Drexel UniversityKathleen Coleman - DEVCOM Army Research LaboratoryBrendan M Hanrahan - DEVCOM Army Research LaboratoryLane W Martin - Rice UniversityIlya Grinberg - Bar-Ilan UniversityJonathan E Spanier (Corresponding Author) - Drexel University
- Publication Details
- Nature communications, v 16(1), 8486
- Publisher
- Nature
- Number of pages
- 8
- Grants
- Grant note
- W911NF-24-2-0100 / United States Department of Defense | United States Army | U.S. Army Research, Development and Engineering Command | Army Research Laboratory (U.S. Army Research Laboratory) W911NF-19-2-0119 / United States Department of Defense | United States Army | U.S. Army Research, Development and Engineering Command | Army Research Laboratory (U.S. Army Research Laboratory)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001582507700031
- Other Identifier
- 991022118470804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Applied