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

Author

Listed:
  • Dongfang Chen

    (Drexel University)

  • Sergey Nisnevich

    (Drexel University)

  • Liyan Wu

    (Drexel University)

  • Zongquan Gu

    (Drexel University)

  • John Carroll

    (Drexel University
    Aberdeen Proving Ground)

  • Yizhe Jiang

    (University of California at Berkeley)

  • Cedric J. G. Meyers

    (Drexel University)

  • Kathleen Coleman

    (U.S. Army Research Laboratory)

  • Brendan M. Hanrahan

    (U.S. Army Research Laboratory)

  • Lane W. Martin

    (Rice University)

  • Ilya Grinberg

    (Bar Ilan University)

  • Jonathan E. Spanier

    (Drexel University
    Drexel University
    Drexel University
    Drexel University)

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 Ba0.8Sr0.2TiO3 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 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.

Suggested Citation

  • Dongfang Chen & Sergey Nisnevich & Liyan Wu & Zongquan Gu & John Carroll & Yizhe Jiang & Cedric J. G. Meyers & Kathleen Coleman & Brendan M. Hanrahan & Lane W. Martin & Ilya Grinberg & Jonathan E. Spa, 2025. "Colossal and tunable dielectric tunability in domain-engineered barium strontium titanate," Nature Communications, Nature, vol. 16(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-63449-4
    DOI: 10.1038/s41467-025-63449-4
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