期刊
NANO LETTERS
卷 20, 期 2, 页码 1047-1053出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.9b04210
关键词
Ferroelectric materials; phase transformation; one-dimensional conductivity; transmission electron microscopy; electron irradiation
类别
资金
- National Natural Science Foundation of China [51801215, 51771200, 51671194]
- Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-JSC027, QYZDJ-SSW-JSC010]
- Thousand Youth Talents Plan of China, LiaoNing Revitalization Talents Program [XLYC1802088]
- Natural Science Foundation of LiaoNing Province [20180550885]
- MEXT [12024046]
- JSPS [17H06094, 17H01314, 19H05791]
- Grants-in-Aid for Scientific Research [17H06094] Funding Source: KAKEN
Ferroelectricity and electrical conductivity are two fundamentally incompatible properties that are difficult to simultaneously achieve in a material. Here, we combine these two contradictory properties by embedding conducting SrNbO3 micro/nanopillars into a ferroelectric SrNbO3.5 (i.e., Sr2Nb2O7) thin film. The high-T-c ferroelectric SrNbO3.5 thin film is epitaxially grown on a LaAlO3 substrate by pulsed laser deposition. The conducting SrNbO3 micro/nanopillars are introduced into the film via an electron-irradiation-induced SrNbO3.5-to-SrNbO3 phase transformation triggered by a focused electron beam. The sizes and distribution of the SrNbO3 micro/nanopillars can be accurately controlled through artificial manipulation of the electron-irradiation-induced SrNbO3.5-to-SrNbO3 phase transformation. The ferroelectric SrNbO3/SrNbO3.5 thin film with an in-plane polarization exhibits an electrical conductivity in the out-of-plane direction. Such conducting ferroelectric thin films may lead to the discovery of plentiful physical phenomena and have great potential for pyroelectric, photoelectric, and multiferroic applications.
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