铁电单晶的可控梯度压电特性

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-11-21 DOI:10.1063/5.0242972

Xinyu Jin, Ming Qiu, Xiangda Meng, Yu Wang, Bohan Xing, Xing Wen, Jinyu Ruan, Xiaolin Huang, Xiaoou Wang, Chengpeng Hu, Peng Tan, Hao Tian

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引用次数: 0

摘要

功能梯度材料（FGMs）具有梯度变化特性，因此在连接不同材料和非均质环境的应用中具有重要意义。铁电单晶体具有多种优异的物理特性，但在晶体生长过程中很难设计出梯度特性。本文报告了一种通过交变电流极化和内部应变设计实现掺杂锰和amp;铁的四方 KTa1-xNbxO3 （锰和amp;铁：KTN）晶体梯度压电特性的方法。此外，在垂直于外加电场的方向上获得了相反的压电系数，其梯度变化范围为 -221 至 227 pC/N。这一现象揭示了柔电场和交流电场对缺陷偶极子和畴结构的共同调节作用。这项研究有助于制造功能梯度压电单晶体，并拓展了 FGM 的应用领域。

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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Controllable gradient piezoelectric properties in ferroelectric single crystals

Functional gradient materials (FGMs) possess gradient-varying properties, which make them important in applications for connecting different materials and inhomogeneous environments. Ferroelectric single crystals have multiple excellent physical properties, but it is difficult to design gradient properties during the crystal growth. Here, a method is reported to achieve gradient piezoelectric properties in the tetragonal Mn&Fe-doped KTa1−xNbxO3 (Mn&Fe: KTN) crystals by alternating current poling and internal strain design. Furthermore, opposite piezoelectric coefficients are obtained in the direction perpendicular to the applied electric field, with a gradient variation from −221 to 227 pC/N. This phenomenon has been revealed to result from the co-regulating effect of flexoelectric field and alternating current electric field on defect dipoles and domain structures. This study contributes to the fabrication of functional gradient piezoelectric single crystals and expands the application scenarios of FGMs.

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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.