通过氮掺入实现钙钛矿氧化物铁电性能的大幅增强。
Large enhancement of ferroelectric properties of perovskite oxides via nitrogen incorporation.
作者信息
Wang Tao, Gong Fenghui, Ma Xue, Pan Shen, Wei Xian-Kui, Kuo Changyang, Yoshida Suguru, Ku Yu-Chieh, Wang Shuai, Yang Zhenni, Hazra Sankalpa, Zhang Kelvin H L, Liu Xingjun, Tang Yunlong, Zhu Yin-Lian, Chang Chun-Fu, Das Sujit, Ma Xiuliang, Chen Lang, Xu Bin, Gopalan Venkatraman, Bellaiche Laurent, Martin Lane W, Chen Zuhuang
机构信息
State Key Laboratory of Advanced Welding and Joining of Materials and Structures, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China.
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
出版信息
Sci Adv. 2025 Jan 10;11(2):eads8830. doi: 10.1126/sciadv.ads8830.
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 BaTiO 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/cm and high Curie temperature of ~1213 K, which are ~2.8 times larger and ~810 K higher than in bulk BaTiO, respectively. These results suggest great potential for anion-substituted perovskite oxides in producing emergent functionalities and device applications.
钙钛矿氧化物具有多种多样的物理性质，这使其成为包括非易失性存储器和逻辑器件在内的多种技术应用的有前途的候选材料。这些性质的化学调控在很大程度上已通过阳离子位点取代实现，而由于合成高质量混合阴离子化合物存在困难，阴离子取代的研究则少得多。在此，通过在氮气生长气氛中进行反应性脉冲激光沉积合成了掺氮的BaTiO薄膜。钛和氮之间增强的杂化诱导出70 μC/cm的大铁电极化和1213 K的高居里温度，分别比块状BaTiO大2.8倍和高~810 K。这些结果表明阴离子取代的钙钛矿氧化物在产生新功能和器件应用方面具有巨大潜力。
Zotero 插件