Article

Article

Curr. Appl. Phys. 2025; 70: 76-80

Published online February 28, 2025 https://doi.org/10.1016/j.cap.2024.11.012

Copyright © The Korean Physical Society.

Nanosecond electric pulse-induced ultrafast piezoelectric responses in Co3+ substituted BiFeO3 epitaxial thin films

Unithrattil S.; Min T.; Anoop G.; Lee J.Y.; kim T.Y.; Samanta S.; Qi Y.; Zhang J.; Hwang S.H.; Lee H.J.; Guo K.; Lee S.Y.; Imai Y.; Sakata O.; Shimizu K.; Shigematsu K.; Hojo H.; Yao K.; Azuma M.; Lee J.; Rappe A.M.; Jo J.Y.

School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, South Korea; Department of Physics, Pusan National University, Busan, 6241, South Korea; Department of Physics, Amrita Vishwa Vidyapeetham, Amritapuri, Kerala, 690525, India; Department of Materials Science and Engineering, University of California, Berkeley, 94720, Califronia, United States; Department of Physics, University of Alabama at Birmingham, Birmingham, 35294, AL, United States; Department of Chemistry, University of Pennsylvania, Philadelphia, 19104-6323, PA, United States; Department of Materials Science and Engineering, Kwangwon National University, Samcheok, 25913, South Korea; School of Power and Energy, Nanchang Hangkong University, Nanchang, 330063, China; Pohang Accelerator Laboratory, POSTECH, Pohang, 37673, South Korea; Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Hyogo, Sayo-gun, 679-5198, Japan; Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, 1-1-1 Kouto, Sayo-cho, Hyogo, Sayo-gun, 679-5148, Japan; Institute of Integrated Research, Institute of Science Tokyo, Yokohama, 226-8501, Japan; Kanagawa Institute of Industrial Science and Technology (KISTEC), Ebina, 243-0435, Japan; Department of Advanced Materials Science and Engineering, Faculty of Engineering Sciences, Kyushu University, Fukuoka, Kasuga, 816-8580, Japan; Institute of Materials Research and Engineering, A∗STAR (Agency for Science, Technology, and Research), Singapore, 138634, Singapore

Abstract

Understanding the ultra-fast dynamics of ferroelectric materials is essential for advancing the development of next-generation high speed electronic and photonic devices. Here, the ultrafast piezoelectric response of cobalt-substituted BiFeO3 (BiFe1-xCoxO3) with x = 0.15, consisting of morphotropic phase boundary of monoclinic MC and MA –type phases is investigated. The real-time piezoelectric response in (001)-oriented BiFe0.85Co0.15O3 (BFCO) epitaxial thin film was monitored using the time-resolved X-ray microdiffraction technique under an applied electric field with pulse widths 70 ns and 100 ns. The BFCO thin film yielded a high piezoelectric strain of approximately 0.53 % along [001] direction, with a giant c/a ratio (∼1.26) at an electric field of 1.3 MV/cm and a pulse width of 100 ns, with a piezoelectric coefficient (d33) of 40 pm/V. This finding is an important step towards the development of a high performance lead-free piezoelectric material for ultrafast operations in advanced technological applications. © 2024 Korean Physical Society

Keywords: BiFeO3, Time-resolved X-ray microdiffraction, Ultrafast piezo response

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