Giant magnetoelectric effects in pseudo 1-3 heterostructure films with FeGa nanocluster-assembled micron-scale discs embedded into Bi5Ti3FeO15 matrices
Giant magnetoelectric effects in pseudo 1-3 heterostructure films with FeGa nanocluster-assembled micron-scale discs embedded into Bi5Ti3FeO15 matrices
复制标题
将 FeGa 纳米团簇组装的微米级圆盘嵌入 Bi5Ti3FeO15 基体中的伪 1-3 异质结构薄膜中的巨磁电效应
DOI：
10.1039/c7nr09652f
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发表时间：
2018
期刊：
影响因子：
6.7
通讯作者：
Zhao Shifeng
中科院分区：
文献类型：
--
作者：
Bai Yulong;Jiang Ning;Zhao Shifeng
通过低能团簇束沉积制备的纳米团簇组装的 FeGa 微米级圆盘嵌入 Bi5Ti3FeO15 基体中，形成伪 1-3 异质结构薄膜。研究了微观结构和多铁性。异质结构薄膜具有良好的铁电、压电和铁磁性能以及巨磁电效应，这归因于这种赝1-3结构硬衬底的钳位效应的抑制以及FeGa微米级圆盘的大磁致伸缩系数与高磁致伸缩系数之间的多界面耦合。 Bi5Ti3FeO15 矩阵周围圆的压电系数。微米圆盘和非均匀多铁基体之间如此强的界面应变耦合引起了明显的磁电耦合行为。此外，铁电域和多铁基体中自旋序之间的相互作用也有助于磁电输出。目前的工作提供了一种为微型设备应用制造无钳位磁电薄膜的潜在方法。
Nanocluster-assembled FeGa micron-scale discs prepared by low-energy cluster beam deposition were embedded into Bi5Ti3FeO15 matrices to form pseudo 1–3 heterostructure films. The microstructures and multiferroic properties were investigated. Good ferroelectric, piezoelectric, and ferromagnetic properties and giant magnetoelectric effects are achieved for the heterostructure films, which is ascribed to the depression of the clamped effect from the hard substrate for such pseudo 1–3 structures and the multi-interface coupling between the large magnetostrictive coefficient of FeGa micron-scale discs and the high piezoelectric coefficient of the circle surrounding the Bi5Ti3FeO15 matrices. Such a strong interface strain coupling between the micron discs and the inhomogeneously multiferroic matrices induces obvious magnetoelectric coupling behaviors. Besides, the interaction between the ferroelectric domains and the spin orders in the multiferroic matrices also contributes to the magnetoelectric output. The present work provides a potential way to fabricate clamped-free magnetoelectric films for microdevice applications.