Ferroelectric Oxide Thin Film with an Out-of-Plane Electrical Conductivity
Ferroelectric Oxide Thin Film with an Out-of-Plane Electrical Conductivity
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具有面外导电性的铁电氧化物薄膜
DOI：
10.1021/acs.nanolett.9b04210
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发表时间：
2020
期刊：
影响因子：
10.8
通讯作者：
Ma Xiuliang
中科院分区：
文献类型：
--
作者：
Yao Tingting;Jiang Yixiao;Chen Chunlin;Yan Xuexi;Tao Ang;Yang Lixin;Sugo Kenyu;Ohta Hiromichi;Ye Hengqiang;Ikuhara Yuichi;Ma Xiuliang
铁电性和导电性是两个根本不相容的特性，很难在材料中同时实现。在这里，我们通过将导电srnbo3微/纳米柱嵌入到铁电SrNbO3.5（即SrNbO3.5）中来结合这两种矛盾的性质。， Sr2Nb2O7)薄膜。采用脉冲激光沉积法在laalo3衬底上外延生长出高铁电srnbo3.5薄膜。通过聚焦电子束触发的电子辐照诱导srnbo3.5到srnbo3相变，将导电srnbo3微/纳米柱引入到薄膜中。通过人工操纵电子辐照诱导的srnbo3.5 - srnbo3相变，可以精确控制srnbo3微/纳米柱的尺寸和分布。具有平面内极化的铁电SrNbO3/ srnbo3.5薄膜具有平面外方向的导电性。这种导电铁电薄膜可能会导致许多物理现象的发现，并且在热释电、光电和多铁应用方面具有很大的潜力。
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 SrNbO3micro/nanopillars into a ferroelectric SrNbO3.5(i.e., Sr2Nb2O7) thin film. The high-Tcferroelectric SrNbO3.5thin film is epitaxially grown on a LaAlO3substrate by pulsed laser deposition. The conducting SrNbO3micro/nanopillars are introduced into the film via an electron-irradiation-induced SrNbO3.5-to-SrNbO3phase transformation triggered by a focused electron beam. The sizes and distribution of the SrNbO3micro/nanopillars can be accurately controlled through artificial manipulation of the electron-irradiation-induced SrNbO3.5-to-SrNbO3phase transformation. The ferroelectric SrNbO3/SrNbO3.5thin 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.