标题:Polarization screening-induced epitaxial growth and interfacial magnetism of BiFeO3/PbTiO3 nanoplates
作者:Fu, Gangjie ;Li, Wei ;Cao, Haiwen ;Chen, Xing ;Wang, Shanpeng ;Luo, Liang ;Wu, Mengjiao ;Tian, He ;Ren, Zhaohui ;Han, Gaorong
作者机构:[Fu, Gangjie ;Li, Wei ;Cao, Haiwen ;Chen, Xing ;Wu, Mengjiao ;Tian, He ;Ren, Zhaohui ;Han, Gaorong ] State Key Laboratory of Silicon Materials, School 更多
来源:CrystEngComm
出版年:2020
卷:22
期:4
页码:639-645
DOI:10.1039/c9ce01862j
摘要:In this work, single-crystal BiFeO3/PbTiO3 (BFO/PTO) nanoplates have been successfully synthesized via a hydrothermal method. It is interesting to find that BFO films selectively grew on the negative polar surface of PTO nanoplates with a saturation thickness of about 18-20 nm. Below such saturation size, the thickness of BFO films can be controlled in the range of 4-18 nm. An atomically sharp interface was identified to be formed between BFO and PTO with an epitaxial relationship of {012}BFO//{001}PTO. In particular, a room-temperature ferromagnetism in the nanoplates has been observed, where the saturation magnetization significantly decreased from to 0.029 to 0.003 emu g-1 upon the film thickness decreasing to 4 nm. Electron energy-loss spectroscopy (EELS) analysis on the interface suggests that the positive polar surface of BFO could be screened by both of the negative polarization and addition electrons in PTO. A mechanism of "screening balance broken and rebuilt" on the negative interface was proposed to explain the existence of selective growth, the saturation thickness and magnetism of the nanoplates. The findings suggest that a polar surface could be a powerful platform to realize the controllable epitaxial growth of perovskite oxide heterostructures with the intriguing interface functionality. © 2020 The Royal Society of Chemistry.
收录类别:EI;SCOPUS
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85078696479&doi=10.1039%2fc9ce01862j&partnerID=40&md5=5bb34265fcc8a22a57b16a2e0ac8ab3a
TOP