Determination of chemical ordering in the complex perovskite Pb(Cd1/3Nb2/3)O3
Abstract
Pure-phase Pb(Cd1/3Nb2/3)O3 (PCN) single crystals and ceramics with a complex perovskite structure are synthesized for the first time. The local chemical ordering in PCN has been investigated by X-ray diffraction (including diffuse scattering) and Cs-corrected transmission electron microscopy experiments. It is concluded that the PCN samples have large coherent chemical ordering regions that even extend to the long range, and the ordering model is consistent with β-type chemical ordered regions. The antiphase domain boundaries were also observed. Two dielectric anomaly peaks were found in these two types of samples, one of which indicates possible relaxor behaviour. The novel structure of the completely ordered regions and its relationship with the electrical properties make PCN a unique material for the fundamental understanding of chemically substituted perovskites.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 24, 2018
- Source ID
- 10.1107/s2052252518013805
Entities
People
- Caiyan Wang
- Jian Zhuang
- Marek Paściak
- Nan Zhang
- Wei Ren
- Zenghui Liu
- Zhengqian Fu
- Zuo-Guang Ye
Organizations
- Czech Science Foundation
- National Natural Science Foundation of China
- Natural Sciences and Engineering Research Council
- Office of Naval Research