多铁性材料是一种同时具有铁电、铁弹、铁磁等两种或者两种以上“铁性”的材料，可以通过多种序参量的耦合产生新的效应，在电子信息、传感、存储、无线网络等领域具备广阔的应用前景。当前在室温下具有强磁电耦合效应的多铁性材料仍然是学者们研究的重点，但基于多铁材料的器件还没有实现应用。应变工程是一种可以有效影响多铁材料物理性质的调控手段，通过晶格与电子、自旋、轨道等的相互作用来影响材料的电、磁、光、声等物理特性，因此通过应变调控多铁性薄膜结构和性能，受到了研究人员的广泛关注。本文通过调研多铁性材料中应变工程的研究，总结了应变调控手段及其对材料物理性能的影响，期望为多铁性材料的研究和发展提供研究思路。

Bismuth ferrite (BFO) nanostructures and thin films have gained attraction as suitable candidates for energy storage and energy conversion due to their high energy storage efficiency, temperature stability and low dielectric loss. Electrical properties of such multiferroic materials are tailored by ferroelectric and ferromagnetic constituents and have opened up amazing avenues in electrochemical supercapacitor and photovoltaic applications. Dopants play a significant role in optimizing the magnetic and dielectric properties of such materials owing to suitable applications. This review highlights the scientific advancements reported in BFO nanostructures for energy applications by optimizing their magnetic and dielectric properties. This paper starts with a brief introduction of BFO and a discussion on the effects of various dopants by different synthesis techniques, and their effects on the magnetic and dielectric properties are also portrayed. Eventually, this review summarizes the various doping effects, which paves way for future research on this multiferroic material.Bismuth ferrite (BFO) nanostructures and thin films have gained attraction as suitable candidates for energy storage and energy conversion due to their high energy storage efficiency, temperature stability and low dielectric loss. Electrical properties of such multiferroic materials are tailored by ferroelectric and ferromagnetic constituents and have opened up amazing avenues in electrochemical supercapacitor and photovoltaic applications. Dopants play a significant role in optimizing the magnetic and dielectric properties of such materials owing to suitable applications. This review highlights the scientific advancements reported in BFO nanostructures for energy applications by optimizing their magnetic and dielectric properties. This paper starts with a brief introduction of BFO and a discussion on the effects of various dopants by different synthesis techniques, and their effects on the magnetic and dielectric properties are also portrayed. Eventually, this review summarizes the various doping effects, which paves way for future research on this multiferroic material.

基于力学参数模型研究了NFO/BTO层状复合薄膜的磁电效应, 发现当压电相的体积分数约为0.47时, 磁电耦合性能最好。通过脉冲激光沉积法在掺 0.7%Nb的(001)-STO衬底上生长了不同体积分数比的2-2型NFO/BCZT异质结构的磁电复合薄膜。XRD结果表明:NFO/BCZT磁电复合薄膜均为(00l)择优取向生长结 构。通过锁相技术测试了NFO/BCZT复合薄膜的磁电耦合系数, 测试结果表明压电相体积稍大于铁磁层体积时, 磁电性能最佳。实验结果与理论结果存在一定差 异, 主要是由于材料实际参数与计算所用参数有差异、界面的非理想耦合无法得到准确的k值以及复合薄膜微观结构、应力等影响。