Thermodynamic potential construction and biaxial stress analysis of K0.4Na0.6NbO3 single crystals

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-09-09 DOI:10.1063/5.0223407

Mingxuan Liu, Chengpeng Hu, Xiangda Meng, Xuejie Sun, Yao Zhang, Bohan Xing, Ming Qiu, Yining Dong, Song Jin, Hao Tian

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引用次数: 0

Abstract

The macroscopic properties of piezoelectric materials can be profoundly influenced by stress. In this research, thermodynamic potential parameters of K0.4Na0.6NbO3 (KNN) single crystals have been experimentally quantified to assess the effects of stress. Leveraging the Landau thermodynamic potential theory, it has been identified that the application of biaxial tensile stress causes a significant elevation in both the piezoelectric property and phase transition temperature in KNN crystals. This transition remarkably extends their working range and improves the material's applicated potential. The coherence between these computational outcomes and experimental data—from the strategic growth of KNN single crystals with internal stress—underscores the reliability of our findings (dielectric constant from 213 to 1274, TO-T from 180 to 234 °C). Additionally, theoretical calculation predicts a potential enhancement in the piezoelectric capabilities of KNN single crystals. This study provides valuable insights for the growth of high-quality piezoelectric crystals and further promotes the application of lead-free piezoelectric materials.

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K0.4Na0.6NbO3 单晶的热力学势构造和双轴应力分析

压电材料的宏观特性会受到应力的深刻影响。本研究通过实验量化了 K0.4Na0.6NbO3 (KNN) 单晶的热力学势参数，以评估应力的影响。利用朗道热力学势理论，我们发现施加双轴拉伸应力会显著提高 KNN 晶体的压电特性和相变温度。这种转变极大地扩展了其工作范围，并提高了材料的应用潜力。这些计算结果与 KNN 单晶体在内应力作用下的策略生长实验数据之间的一致性证明了我们研究结果的可靠性（介电常数从 213 升至 1274，TO-T 从 180 升至 234°C）。此外，理论计算预测 KNN 单晶的压电能力可能会增强。这项研究为高质量压电晶体的生长提供了宝贵的见解，并进一步促进了无铅压电材料的应用。

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.

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