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.

中文翻译：

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FeGa纳米簇组装的微米级圆片嵌入Bi ₅ Ti ₃ FeO ₁₅基质中， 在伪1-3异质结构薄膜中具有巨大的磁电效应。

通过低能簇束沉积制备的纳米簇组装的FeGa微米级圆盘被嵌入到Bi ₅ Ti ₃ FeO ₁₅基质中，形成伪1-3异质结构膜。研究了显微组织和多铁性。异质结构薄膜具有良好的铁电，压电和铁磁性能，并具有巨大的磁电效应，这归因于这种伪1-3结构的硬质基底的夹持效应降低，以及大磁致伸缩之间的多界面耦合FeGa微米级圆盘的系数和Bi ₅ Ti ₃ FeO ₁₅周围的圆的高压电系数矩阵。微米圆盘和非均匀多铁性基体之间的这种强界面应变耦合引起明显的磁电耦合行为。此外，多铁性矩阵中铁电畴与自旋阶之间的相互作用也有助于磁电输出。本工作提供了一种潜在的方式来制造用于微器件应用的无钳位磁电薄膜。