论文标题
通过X射线磁圆二色性在COMN合金和MNGA层之间的界面上进行退火来追踪磁原子扩散
Tracing magnetic atom diffusion with annealing at the interface between CoMn alloy and MnGa layer by X-ray magnetic circular dichroism
论文作者
论文摘要
使用X射线磁性圆形二色性（XMCD）分析研究了COMN合金和MNGA层之间界面的磁原子扩散。 We found that the spins in bcc CoMn are coupled parallel to those in perpendicularly magnetized MnGa layer under the as-grown conditions, while the post-annealing modulates the interfacial magnetic coupling to antiferromagnetic in Co. The element-specific hysteresis curves at each absorption edge revealed the large coercive fields in Mn and Co through the exchange coupling with MnGa.退火过程后，XMCD光谱线形状的变化与促进MN和CO2MNGA层的形成的界面反应有关，这是根据透射电子显微镜的分析推导的。 Mn原子的界面扩散调节MN和CO位置之间的磁交换耦合，并逆转垂直磁化的方向。
The magnetic atom diffusion at the interface between CoMn alloy and MnGa layer with annealing is studied using x-ray magnetic circular dichroism (XMCD) analysis. We found that the spins in bcc CoMn are coupled parallel to those in perpendicularly magnetized MnGa layer under the as-grown conditions, while the post-annealing modulates the interfacial magnetic coupling to antiferromagnetic in Co. The element-specific hysteresis curves at each absorption edge revealed the large coercive fields in Mn and Co through the exchange coupling with MnGa. After the annealing process, the changes of XMCD spectral line shapes are related to the interfacial reactions promoting the formation of Mn and Co2MnGa layers, which is deduced from the analysis of transmission electron microscopy. The interfacial diffusion of Mn atoms modulates the magnetic exchange coupling between Mn and Co sites and reverses the direction of perpendicular magnetization.
