“弱条纹畴相”磁性薄膜的磁振子特性研究

本项目将围绕“弱条纹畴相”磁性金属氧化物薄膜的磁振子特性开展系统研究。以室温超低磁阻尼磁性金属氧化物薄膜的磁畴调控为出发点，探索具有宏观量子效应的磁振子晶体材料，构筑新型磁振子器件。具体包括以下几方面的工作：1）系统研究具有“弱条纹畴相”结构的磁性金属氧化物薄膜材料的生长工艺，深入分析“弱条纹畴相”的拓扑磁畴结构与多场调控机制；2）研究“弱条纹畴相”中磁振子传输的“类光纤”波导效应的产生机制；3）厘清“弱条纹畴相”磁性金属氧化物薄膜中磁振子-磁振子耦合现象的物理机制；4）实验构筑出1-2种磁振子原型器件。该项目实施将为磁振子晶体的研究提供全新的材料平台，对未来实现超低能耗宏观量子器件奠定科学基础。

This project will systematically study the magnonic properties of the magnetic metal oxide thin films with “weak-stripe domain phase”. Starting from the control of magnetic domain of the magnetic metal oxide thin films with ultra-low magnetic damping at room temperature, we intend to explore magnonic crystal materials with macroscopic quantum effects and design novel magnonic devices. First of all, we will systematically study the manufacturing technique of magnetic metal oxide thin films with “weak-stripe domain phase”, analyse the topological magnetic domain structure and multi-field control mechanism of the “weak-stripe domain phase”. Secondly, we will study the mechanism of "fiber-like" magnon waveguide effect in "weak stripe domain phase". Thirdly, we will clarify the physical mechanism of the magnon-magnon coupling phenomenon in the magnetic metal oxide thin films with “weak-stripe domain phase”. Fourthly, we will design one or two kinds of prototype magnonic devices. This project will provide a new material platform for the research of magnonic crystals, and lay a solid scientific foundation for the ultra-low energy consumption macroscopic quantum devices in the future.