论文标题
反铁磁MN $ _2 $ au的隧道连接处的巨型磁性
Giant magnetoresistance in antiferromagnetic Mn$_2$Au-based tunnel junction
论文作者
论文摘要
最近关于通过N {é} El Spin-Orbit扭矩的四方抗铁磁铁（AFM）电转换的研究为经济使用抗磁磁材料铺平了道路。目前，最困难的障碍是限制抗铁磁材料在旋转技术中的应用，尤其是在存储器存储应用中，可能是基于AFM的纳米结构中的小而脆弱的磁舒张（MR）。在这项研究中，我们研究了基于第一原则散射理论的Mn $ _2 $ _2 $ au基于AU的隧道连接的旋转运输。巨型MRS超过$ 1000 \％$的$ $预测在某些FE/MGO/AG/MN $ _2 $ au/ta连接处的订单与基于MGO的铁磁隧道连接处的订单大致相同的订单。自旋滤波效果，量子良好的谐振状态和界面共振状态的相互作用可能是对这些MN $ _2 $ au基于AU的连接中观察到的异常巨型和强大的MRS的原因。
Recent studies on the electrical switching of tetragonal antiferromagnet (AFM) via N{é}el spin-orbit torque have paved the way for the economic use of antiferromagnetic materials. The most difficult obstacle that presently limits the application of antiferromagnetic materials in spintronics, especially in memory storage applications, could be the small and fragile magnetoresistance (MR) in the AFM-based nanostructure. In this study, we investigated the spin transports in Mn$_2$Au-based tunnel junctions based onthe first-principle scattering theory. Giant MRs more than $1000\%$ are predicted in some Fe/MgO/Ag/Mn$_2$Au/Ta junctions that are about the same order as that in an MgO-based ferromagnetic tunnel junction with same barrier thickness. The interplay of the spin filtering effect, the quantum well resonant states, and the interfacial resonant states could be responsible for the unusual giant and robust MRs observed in these Mn$_2$Au-based junctions.
