Mn-inlaid antiphase boundaries in perovskite structure

Chao Li, Lingyan Wang (), Liqiang Xu (), Xuerong Ren, Fangzhou Yao, Jiangbo Lu, Dong Wang, Zhongshuai Liang, Ping Huang, Shengqiang Wu, Hongmei Jing, Yijun Zhang, Guohua Dong, Haixia Liu, Chuansheng Ma, Yinong Lyu, Xiaoyong Wei, Wei Ren, Ke Wang, Zuo-Guang Ye and Feng Chen ()
Additional contact information
Chao Li: Xi’an Jiaotong University
Lingyan Wang: Xi’an Jiaotong University
Liqiang Xu: Anhui University
Xuerong Ren: Xi’an Jiaotong University
Fangzhou Yao: Wuzhen Laboratory
Jiangbo Lu: Shaanxi Normal University
Dong Wang: Xi’an Jiaotong University
Zhongshuai Liang: Xi’an Jiaotong University
Ping Huang: Xi’an Jiaotong University
Shengqiang Wu: Peking University
Hongmei Jing: Shaanxi Normal University
Yijun Zhang: Xi’an Jiaotong University
Guohua Dong: Xi’an Jiaotong University
Haixia Liu: Xi’an Jiaotong University
Chuansheng Ma: Xi’an Jiaotong University
Yinong Lyu: Nanjing Tech University
Xiaoyong Wei: Xi’an Jiaotong University
Wei Ren: Xi’an Jiaotong University
Ke Wang: Wuzhen Laboratory
Zuo-Guang Ye: Simon Fraser University
Feng Chen: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Improvements in the polarization of environmentally-friendly perovskite ferroelectrics have proved to be a challenging task in order to replace the toxic Pb-based counterparts. In contrast to common methods by complex chemical composition designs, we have formed Mn-inlaid antiphase boundaries in Mn-doped (K,Na)NbO3 thin films using pulsed laser deposition method. Here, we observed that mono- or bi-atomic layer of Mn has been identified to inlay along the antiphase boundaries to balance the charges originated from the deficiency of alkali ions and to induce the strain in the KNN films. Thus, rectangular saturated polarization-electric field hysteresis loops have been achieved, with a significantly improved twice remanent polarization of 114 μC/cm2 with an applied electric field of 606 kV/cm, which can be comparable to that of the typical Pb-based thin films. Moreover, we directly see the Mn occupation at the A-site of KNN perovskite structure using atomic-scale microstructure and composition analysis. The Mn-inlaid antiphase boundary can further enrich the understanding of perovskite crystal structure and give more possibilities for the design and optimization of perovskite materials.

Date: 2024
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DOI: 10.1038/s41467-024-51024-2

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