Local Structure Analysis around Ti in Lead Zirconate Titanate by X‐Ray Fluorescence Holography
Abstract
To clarify the mechanism of ferroelectricity in lead zirconate titanate (PZT), the local structure around Ti in a Pb(Zr0.7Ti0.3)O3 single crystal is investigated using X‐ray fluorescence holography. The raw hologram data are contaminated by periodic noise due to the fluctuation of the incident X‐ray intensity. The periodical noise is successfully removed using an inverse Fourier transformation method. From the filtered holograms, the atomic images around Ti can be reconstructed clearly. The reconstructions of B‐site cations demonstrate an outward displacement of the neighboring Ti from the ideal B‐site position, indicating an expansion of the local lattice around Ti. In addition, the splitting of Pb images is found, and the relative displacement between Ti and Pb atoms is deduced. These results contribute to the understanding of the local structure of PZT and can reveal the microscopic origins of very high dielectric and piezoelectric responses, which are essential for designing new and improved ferroelectric materials.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 20, 2020
- Source ID
- 10.1002/pssb.202000191
Entities
People
- Alexei A Bokov
- Artoni Kevin R. Ang
- Cong Lu
- Kenji Ohwada
- Kouichi Hayashi
- Naohisa Happo
- Shinya Hosokawa
- Tomohiro Matsushita
- Wen Hu
- Yujuan Xie
- Zuo-Guang Ye
Organizations
- Brookhaven National Laboratory
- Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada
- Hiroshima City University
- Japan Society for the Promotion of Science
- Kumamoto University
- Nagoya Institute of Technology
- Nara Institute of Science and Technology
- Office of Naval Research Global
- Simon Fraser University