自然光诱导自由载流子的界面磁性调控研究

通过弱光光场途径调控磁性金属电子自旋翻转对于实现多材料耦合和多物理场调控具有重要的意义。在传统调控方法中，利用磁场、电场和强光场（飞秒激光、单色激光以及偏振光等）实现磁性的调控，这样的手段带来了高能耗、高温度效应以及高成本的“三高”问题。因此，如何在室温下使得铁磁材料磁矩得以在垂直于膜面和平行于膜面方向进行翻转是本项目课题申请的重点研究对象。本项目从利用自然光建立起光磁耦合的新型磁场调控机制，设计出具有对弱光响应的磁性器件结构，阐述了光磁耦合调控机制，把控材料界面磁性变化。同时，对光磁耦合机制超快动力学过程进行细致研究，不断优化器件结构与性能，建立可见光光磁耦合调控机制工作模型，实现多层耦合结构经典磁性效应的自然光调控，促进自旋电子器件的发展，实现新型多功能材料的深入研究与学科交叉，为新型磁调控机制提供新的思路与视野。

It is significant to control of the electron spin properties via the optical field with natural light to realize the multiple materials coupling and physical field regulation methods. In the conventional control of magnetism methods, including magnetic field (M-field), electric field (E-field) and optical filed (femtosecond laser, monochromatic laser and polarized light, etc.). However, such means bring “3H ” issues of high energy consumption, high temperature effect and high economic cost, respectively. Therefore, how to make the magnetic moment of ferromagnetic material flip perpendicular or parallel to the membrane surface at room temperature is the key point of this project. In this case, a new magnetism regulation mechanism is established by introducing photomagnetic coupling with natural light and this type of devices are also designed. The photo induced magnetic coupling regulation mechanism is elaborated to vary the magnetism at the material interfaces. At the same time, the flexible devices based on spintronics properties are also fabricated and studied. The interfacial photoelectrons overarch the field of solar power and the field of spintronics, creating an interdisciplinary subarea of photovoltaic spintronics. It provides the changes for discipline overlapping and the new mentality for the research and development of new vision of magnetism regulation.