论文标题
在室温天气托管多层的室温下，深度依赖磁跨界
Depth-dependent magnetic crossover in a room-temperature skyrmion-hosting multilayer
论文作者
论文摘要
Skyrmion托管多层堆栈是应用的有前途的途径，尽管对磁性的深度依赖性知之甚少。我们通过报道圆二色性谐振弹性X射线散射（CD-REXS），微磁模拟和低能振荡旋转旋转（Le- $μ^+$ sr）测量的结果来解决这一问题。能量依赖性的CD-REXS显示出与入射能的域壁螺旋角的连续，单调的演变，与三维杂种域壁样结构一致，从表面附近的Néel样变化到样品中的Bloch样更深。 le-$μ^+$ sr表明，堆栈表面附近的三层中的磁场分布与样品中更深层的三层中的磁场分布不同。我们的微磁模拟支持$μ^+$ SR结果的定量分析。通过增加施加的磁场，我们发现域壁在所有深度占据的体积减少，与大约180吨以上的天空占主导地位的跨界区域一致。
Skyrmion-hosting multilayer stacks are promising avenues for applications, although little is known about the depth dependence of the magnetism. We address this by reporting the results of circular dichroic resonant elastic x-ray scattering (CD-REXS), micromagnetic simulations, and low-energy muon-spin rotation (LE-$μ^+$SR) measurements on a stack comprising [Ta/CoFeB/MgO]$_{16}$/Ta on a Si substrate. Energy-dependent CD-REXS shows a continuous, monotonic evolution of the domain-wall helicity angle with incident energy, consistent with a three-dimensional hybrid domain-wall-like structure that changes from Néel-like near the surface to Bloch-like deeper within the sample. LE-$μ^+$SR reveals that the magnetic field distribution in the trilayers near the surface of the stack is distinct from that in trilayers deeper within the sample. Our micromagnetic simulations support a quantitative analysis of the $μ^+$SR results. By increasing the applied magnetic field, we find a reduction in the volume occupied by domain walls at all depths, consistent with a crossover into a region dominated by skyrmions above approximately 180 mT.
