磁子驱动的长程非易失界面磁电耦合调控软磁材料高频特性的研究

In this project, according to the development of new electron devices towards integration and high-frequency, it is highly desirable to find a way to efficiently and precisely control of high frequency magnetic properties of soft magnetic materials. The electric field with localization and low energy consumption provides a new route to solve the important issue. However, the magnetoelectric coupling mechanism of electric field-mediated the high frequency properties of soft magnetic material has not been clear. We will focus on how magnon-driven long-range non-volatile interfacial magnetoelectric coupling to mediate the high frequency magnetic properties in soft magnetic materials. Based on this case, the project will be aimed to design and fabricate the soft magnetic material deposited on the ferroelectric substrate. According to the theoretical analysis of magnon-driven long-range non-volatile interfacial magnetoelectric coupling and the measurement of dc and microwave ac magnetic properties, the magnetoelectric coupling controlled the magnetization precession in microwave field will be investigated. Meanwhile, the relationship of magnetization precession and resonance frequency and permeability mediated by the magnetoelectric coupling can be demonstrated, further revealing the magnon-driven long-range non-volatile interfacial magnetoelectric coupling mechanism, which is a significant step toward the magnetoelectric coupling tuning of high resonance frequency and high permeability. The results of this project will be helpful for profoundly understanding magnon-driven long-range non-volatile interfacial magnetoelectric coupling mechanism, meanwhile, provide a guide for the integration and high-frequency development of magnetic devices.

面对新型电子器件高频化、集成化的应用发展，亟需一种有效控制软磁材料高频特性的新手段。电场控制具有局域化、低能耗的优势，为解决软磁材料高频特性的调制提供新的途径，然而该磁电耦合调控机理尚不明确。本项目拟构建软磁材料/铁电基底多铁异质结体系，围绕多铁异质结中磁子驱动的长程非易失界面磁电耦合如何调控软磁材料高频特性这个关键科学问题，重点研究多铁异质结的设计与制备，通过电场调控软磁材料的直流磁性测试和基于电磁波传输理论的微波交流磁性测试，探讨磁子驱动的长程非易失界面磁电耦合对软磁材料磁化强度动力学过程的影响，阐明这种磁电耦合作用下软磁材料磁化强度动力学过程与共振频率和磁导率的关系，揭示磁子驱动的长程非易失界面磁电耦合调控机理，进而实现对软磁材料高共振频率和高磁导率的调控。项目研究不仅有助于深刻理解磁子驱动的长程非易失界面磁电耦合调控机理，而且为新型电子器件高频化和集成化发展提供新思路和重要参考。

本项目围绕软磁材料/铁电基底多铁异质结中磁子驱动的长程非易失界面磁电耦合调控软磁材料高频特性这个关键科学问题，研究了多铁异质纳米结构薄膜的设计与制备，通过原位电场调控的直流和基于电磁波传输理论的微波交流磁性测试，探讨了磁子驱动的长程非易失界面磁电耦合对软磁材料磁化动力学过程的影响，进而调制软磁材料的磁各向异性场和共振场，原位加电场磁谱测量进一步阐明了这种磁电耦合作用下磁化动力学过程与共振频率和磁导率的关系，从而实现对软磁材料高共振频率和高磁导率的调控，完成了项目的预期目标。通过本项目的研究不仅有助于探究磁子驱动的长程非易失磁电耦合对软磁材料高频特性的调控，而且深化了对磁子驱动的长程非易失磁电耦合调控机制的理解，为新型电子器件高频化和集成化提供新的路径，对电子器件多功能化发展有重要意义。在本项目的资助下，发表SCI论文8篇，目前仍有1篇SCI论文返修中，还有部分成果正在整理待发表；培养研究生1名。