Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing.
Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing.
复制标题
通过溶液处理实现具有磁切换极化的大规模多铁复合氧化物外延
DOI：
10.1093/nsr/nwz143
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发表时间：
2020-01
影响因子：
20.6
通讯作者：
Li J
中科院分区：
文献类型：
--
作者：
Liu C;An F;Gharavi PSM;Lu Q;Zha J;Chen C;Wang L;Zhan X;Xu Z;Zhang Y;Qu K;Yao J;Ou Y;Zhao Z;Zhong X;Zhang D;Valanoor N;Chen L;Zhu T;Chen D;Zhai X;Gao P;Jia T;Xie S;Zhong G;Li J
具有可调结构的复合氧化物具有许多迷人的特性，但精确控制成分的高质量复合氧化物外延仍然遥不可及。在此，我们成功地开发了大面积多铁性（1-x）BiTi（1-y）/2FeyMg（1-y）/2 O3-（x）CaTiO 3（BTFM-CTO）固溶体的溶液基单晶外延，证实了其在原子尺度上具有强自发极化的铁电性。仔细的成分调整导致室温下0.07 ± 0.035 μB/Fe的体磁化强度，使磁感应极化开关表现出2.7-3.0 × 10−7 s/m的大磁电系数。这项工作展示了溶液加工在大规模复杂氧化物外延中的巨大潜力，并在外延BTFM-CTO薄膜中建立了新型的室温磁电耦合，使探索更广泛的成分、相和结构空间成为可能，可以很容易地扩大规模用于工业应用。
Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic (1-x)BiTi(1-y)/2FeyMg(1-y)/2O3–(x)CaTiO3 (BTFM–CTO) solid solution in large area, confirming its ferroelectricity at the atomic scale with strong spontaneous polarization. Careful compositional tuning leads to a bulk magnetization of 0.07 ± 0.035 μB/Fe at room temperature, enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7–3.0 × 10−7 s/m. This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM–CTO film, making it possible to explore a much wider space of composition, phase, and structure that can be easily scaled up for industrial applications.