Ultra-large strain response in BNT-BT-KNN thin films boosted by electric field-induced inversion of long-range ordered polarization

IF 8.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics Pub Date : 2024-07-05 DOI:10.1016/j.jmat.2024.06.005

Jinyan Zhao , Zhe Wang , Liyan Dai , Chuying Chen , Kun Zheng , Ruihua An , Zenghui Liu , Nan Zhang , Yi Quan , Lingyan Wang , Genshui Wang , Xin Li , Yulong Zhao , Gang Niu , Wei Ren

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Abstract

Bismuth sodium titanate (BNT)-based piezoelectric materials are the most promising candidates for lead-free actuator applications. With the request for integration and size miniaturization of devices, it is urgent to develop thin films for microdevices to be compatible with semiconductor processes. Through composition engineering, BNT-based thin films were fabricated on silicon substrates, with ultra-high strain response and negligible hysteresis in strain curves. The DC-dependent and temperature-dependent dielectric properties were collected to investigate the relaxor state of thin films. The structure and polarization transition and evolution as a function of electric field and time were analyzed based on the electric characterization, in-situ Raman measurements, and dynamics PFM. The reversible phase transition and polarization order-disorder transformation are the most significant features for reaching a large strain of >1.6% in BNT-based thin films.

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电场诱导的长程有序极化反转促进 BNT-BT-KNN 薄膜的超大应变响应

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来源期刊

Journal of Materiomics Materials Science-Metals and Alloys

CiteScore

14.30

自引率

6.40%

发文量

331

审稿时长

37 days

期刊介绍： The Journal of Materiomics is a peer-reviewed open-access journal that aims to serve as a forum for the continuous dissemination of research within the field of materials science. It particularly emphasizes systematic studies on the relationships between composition, processing, structure, property, and performance of advanced materials. The journal is supported by the Chinese Ceramic Society and is indexed in SCIE and Scopus. It is commonly referred to as J Materiomics.