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

IF 15.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Nature Communications Pub Date : 2025-09-26 DOI:10.1038/s41467-025-63449-4

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 Spanier

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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.

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畴工程钛酸锶钡的巨大可调介电可调性。

在动态变化的环境中实现多功能并保持高性能的可调材料是科学和工程的基本目标。可调谐电介质构成了各种通信和传感设备的基础，需要突破性的性能改进才能实现下一代技术。通过现象建模、薄膜生长和表征，我们发现由靠近极性畴变相边界的富畴壁Ba0.8Sr0.2TiO3薄膜组成的器件在~15 V （750 kV/cm）的电压（电场）下表现出100:1（99%）的巨大介电可调性，导致可调性质量因子积值上升到接近105，比之前报道的最佳值高出两个数量级。值得注意的是，由于畴壁运动，改变交流偏置的幅度可以使这种可调性调制50%。这些结果表明，畴工程是实现铁电薄膜功能特性调制的有力途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nature Communications Biological Science Disciplines-

CiteScore

24.90

自引率

2.40%

发文量

6928

审稿时长

3.7 months

期刊介绍： Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.