电场引导氢离子迁移导致的磁性调控

实现电场引导离子迁移调控磁性被认为是实现超低能耗的磁电子器件及存储技术可能路径之一。本项目将开展全固态下电场引导氢离子迁移对薄膜器件磁性的调控。首先将研究对象聚焦于垂直磁各向异性（稀土过渡族补偿亚铁磁非晶薄膜、Pt/CoFeB/GdOx、Pt/Fe、PtFe)体系，研究对其面内、面外磁化强度、矫顽力、磁各向异性等的调控，对其磁响应与恢复时间、稳定性开展研究，研究电场引导氢离子迁移对Pt/TbCo、Pt/CoFeB/GdOx等SOT器件体系中磁翻转临界电流密度的调控。 研究氢离子迁移对TbCo、GdCo、GdFeCo等材料补偿点、居里温度、磁交换作用等的调控，以及对Ta/CoFeB/GdOx、Fe3O4、La1-xSrxMnO3等器件磁性的调控。将寻求可能实现电场引导氢离子迁移而快速调控室温强铁磁性与顺磁性互相转换的材料器件。本项目不仅具有科学研究的意义，而且具有潜在的应用前景。

The realization of the modulation of magnetism by the electric field via the ion migration is considered to be one of the possible ways to realize the magnetoelectric and storage devices with ultra-low energy consumptions. This project will carry out the modulation of the magnetic properties of the thin film devices by the electric field guiding the hydrogen ion migration in the solid state. At first, we focus on the perpendicular magnetic anisotropic systems (the compensated rare earth transition ferrimagnetic amorphous films, Pt/CoFeB/GdOx, Fe/Pt and PtFe). We shall study the modulation of electric field induced hydrogen ion migration on the in-plane and out-plane magnetization, coercive force, magnetic anisotropy, magnetic response and recovery time, and control stability. We also study the modulation of electric field induced hydrogen ion migration on the critical current density for SOT magnetic reversal in Pt/TbCo and Pt/CoFeB/GdOx devices. Then, we shall investigate not only the hydrogen ion migration modulation on the compensation temperature, Curie temperature and magnetic exchange interaction of TbCo,GdCo and GdFeCo systems, but also on the magnetic properties for Ta/CoFeB/GdOx,Fe3O4 and La1-xSrxMnO3. We shall explore the possible material system with fast transformation between strong ferromagnetism and paramagnetism induced by electric field via the hydrogen ion migration. This project not only has the significance of scientific research, but also has the potential applications.