论文标题
层间交换通过IR掺杂的CU旋转厅材料耦合
Interlayer exchange coupling through Ir-doped Cu spin Hall material
论文作者
论文摘要
在相邻铁磁层中磁化载体的金属超晶格在抗铁磁层通过非磁性间隔层的互换偶联在抗铁磁性上是可用于抗铁磁性（AF）的系统研究的系统。作为表现出显着的自旋效果的非磁性间隔层材料的候选，这对于实现自旋轨道转换至关重要，我们在这项研究中选择了IR掺杂的CU。研究了Co / cu $ _ {95} $ ir $ _ {5} $ / co的AF耦合，并与Co / cu / co和co / ir / co进行了比较。在Cu / co / co / ir / co中，AF偶联强度的最大幅度是0.39 mj / m $^{2} $ $ $ $ _ $ _ $ _ $ _; 0.75 nm。此外，我们发现了Cu $ _ {95} $ ir $ _ {5} $ in Co / cu $ _ {95} $ _ {95} $ ir $ _ {5} $双层通过进行Spin Hall Magnetoresance和Hall Magnetoresistance and Harmonic Hall电压测量值，估计为3〜4％的旋转Hall Magnetoresance and Hall hall电压测量，这是一个大的旋转厅角度。我们的实验结果清楚地表明，Cu $ _ {95} $ ir $ _ {5} $是一个非磁性间隔层，使我们能够通过Spin Hall效应实现适度强大的AF耦合并产生明显的自旋轨道扭矩。
Metallic superlattices where the magnetization vectors in the adjacent ferromagnetic layers are antiferromagnetically coupled by the interlayer exchange coupling through nonmagnetic spacer layers are systems available for the systematic study on antiferromagnetic (AF) spintronics. As a candidate of nonmagnetic spacer layer material exhibiting remarkable spin Hall effect, which is essential to achieve spin-orbit torque switching, we selected the Ir-doped Cu in this study. The AF-coupling for the Co / Cu$_{95}$Ir$_{5}$ / Co was investigated, and was compared with those for the Co / Cu / Co and Co / Ir / Co. The maximum magnitude of AF-coupling strength was obtained to be 0.39 mJ/m$^{2}$ at the Cu$_{95}$Ir$_{5}$ thickness of about 0.75 nm. Furthermore, we found a large spin Hall angle of Cu$_{95}$Ir$_{5}$ in Co / Cu$_{95}$Ir$_{5}$ bilayers by carrying out spin Hall magnetoresistance and harmonic Hall voltage measurements, which are estimated to be 3 ~ 4 %. Our experimental results clearly indicate that Cu$_{95}$Ir$_{5}$ is a nonmagnetic spacer layer allowing us to achieve moderately strong AF-coupling and to generate appreciable spin-orbit torque via the spin Hall effect.
