Temperature-dependent characterization of piezoelectric, dielectric, and elastic properties in K0.61Na0.39NbO3 single crystals

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-07-23 DOI:10.1063/5.0275822

Song Jin, Chengpeng Hu, Xiangda Meng, Xuejie Sun, Mingxuan Liu, Ming Qiu, Yining Dong, Peng Tan, Yu Wang, Jiazhi Wang, Hao Tian

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Abstract

Accurate and self-consistent measurement of the dielectric, piezoelectric, and elastic parameters of potassium-sodium niobate (K1−xNaxNbO3, KNN) single crystals is essential for both theoretical studies and the development of KNN-based device applications. In this study, K0.61Na0.39NbO3 single crystals demonstrate a markedly higher shear-mode piezoelectric coefficient d15 (210.34 pC/N) compared to the longitudinal coefficient d33 (60.36pC/N) and thus classified as “rotator” ferroelectric crystals. The crystals exhibit exceptional thermal stability in the orthorhombic phase, with d33 increasing by only ∼1% over a wide temperature range from −100 to 150 °C. Additionally, calculations of piezoelectric coefficients along the [001] direction show that ferroelectric domain contributions account for over 40% of the total piezoelectric response at room temperature. At the same time, ferroelectric domains also exhibit significant temperature sensitivity. This dual behavior offers key insights for domain engineering of KNN-based materials aimed at enhancing electromechanical performance.

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K0.61Na0.39NbO3单晶压电、介电和弹性特性的温度依赖性表征

精确和自一致的测量铌酸钾钠（K1−xNaxNbO3， KNN）单晶的介电、压电和弹性参数对于理论研究和KNN基器件应用的发展至关重要。在本研究中，K0.61Na0.39NbO3单晶的剪切型压电系数d15 （210.34 pC/N）明显高于纵向系数d33 (60.36pC/N)，可归类为“旋转体”铁电晶体。晶体在正交相中表现出优异的热稳定性，d33在−100至150°C的宽温度范围内仅增加~ 1%。此外，沿[001]方向的压电系数计算表明，铁电畴贡献占室温下总压电响应的40%以上。同时，铁电畴也表现出明显的温度敏感性。这种双重行为为旨在提高机电性能的knn基材料的领域工程提供了关键见解。

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

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.