1. Large enhancement of ferroelectric properties of perovskite oxides via nitrogen incorporation.
- Author
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Tao Wang, Fenghui Gong, Xue Ma, Shen Pan, Xian-Kui Wei, Changyang Kuo, Suguru Yoshida, Yu-Chieh Ku, Shuai Wang, Zhenni Yang, Hazra, Sankalpa, Zhang, Kelvin H. L., Xingjun Liu, Yunlong Tang, Yin-Lian Zhu, Chun-Fu Chang, Sujit Das, Xiuliang Ma, Lang Chen, and Bin Xu
- Abstract
Perovskite oxides have a wide variety of physical properties that make them promising candidates for versatile technological applications including nonvolatile memory and logic devices. Chemical tuning of those properties has been achieved, to the greatest extent, by cation-site substitution, while anion substitution is much less explored due to the difficulty in synthesizing high-quality, mixed-anion compounds. Here, nitrogen-incorporated BaTiO3 thin films have been synthesized by reactive pulsed-laser deposition in a nitrogen growth atmosphere. The enhanced hybridization between titanium and nitrogen induces a large ferroelectric polarization of 70 μC/cm² and high Curie temperature of ~1213 K, which are ~2.8 times larger and ~810 K higher than in bulk BaTiO3, respectively. These results suggest great potential for anion-substituted perovskite oxides in producing emergent functionalities and device applications. [ABSTRACT FROM AUTHOR]
- Published
- 2025