论文标题
旋转泵化实验中界面氧化层的影响Ni $ _ {80} $ fe $ _ {20} $/sriro $ _3 $杂质结构
Effect of interfacial oxidation layer in spin pumping experiments on Ni$_{80}$Fe$_{20}$/SrIrO$_3$ heterostructures
论文作者
论文摘要
Sriro $ _3 $具有大型自旋轨道耦合和低电荷电导率已成为自旋设备中有效自旋轨道扭矩磁化控制的潜在候选者。我们在这里报告了界面氧化物层对ni $ _ {80} $ fe $ _ {20} $（nife）/sriro $ _3 $ biyer异质结构的旋转泵化实验的影响。为了研究这种情况，我们进行了宽带铁磁共振（BBFMR）测量，这表明存在界面抗磁性氧化物层。我们在低温温度下进行了平面内BBFMR实验，这使我们能够同时研究动态自旋泵浦特性（Gilbert Damping）和静态磁性特性（例如有效的磁化和磁各向异性）。分析了Nife/sriro $ _3 $双层薄膜的结果，并将其与Nife/nbn/sriro $ _3 $ Trilayer参考样品进行了比较，其中插入了旋转透明的，超透明的NBN层以防止Nife的Nife氧化。在低温下，我们观察到这些样品的磁化动力学参数有很大的差异，可以通过Nife/sriro $ _3 $ bilayers中的反铁磁界面层来解释。
SrIrO$_3$ with its large spin-orbit coupling and low charge conductivity has emerged as a potential candidate for efficient spin-orbit torque magnetization control in spintronic devices. We here report on the influence of an interfacial oxide layer on spin pumping experiments in Ni$_{80}$Fe$_{20}$ (NiFe)/SrIrO$_3$ bilayer heterostructures. To investigate this scenario we have carried out broadband ferromagnetic resonance (BBFMR) measurements, which indicate the presence of an interfacial antiferromagnetic oxide layer. We performed in-plane BBFMR experiments at cryogenic temperatures, which allowed us to simultaneously study dynamic spin pumping properties (Gilbert damping) and static magnetic properties (such as the effective magnetization and magnetic anisotropy). The results for NiFe/SrIrO$_3$ bilayer thin films were analyzed and compared to those from a NiFe/NbN/SrIrO$_3$ trilayer reference sample, where a spin-transparent, ultra-thin NbN layer was inserted to prevent oxidation of NiFe. At low temperatures, we observe substantial differences in the magnetization dynamics parameters of these samples, which can be explained by an antiferromagnetic interfacial layer in the NiFe/SrIrO$_3$ bilayers.
