论文标题
直接写入纳米元素中的工程磁化和交换刚度
Engineered magnetization and exchange stiffness in direct-write Co-Fe nanoelements
论文作者
论文摘要
具有工程磁化的培养基是超导性，磁性和镁旋转器中必不可少的基础。但是，已建立的薄膜和光刻技术不足以适合在横向尺寸中使用按需限制磁化的平面成分的实现。在这里，我们演示了通过聚焦电子束诱导沉积（febid）的无面膜技术制造的基于COFE的纳米风险的磁性特性的工程。纳米虫中的材料组成是通过febid过程中的电子束等待时间调节\ emph {intu}的，及其对GA离子的增长后照射。磁化$ m_s $和交换刚度$ a $ a $ a $是从垂直的铁磁共振测量中推导的。在广泛范围内，已实现的$ M_S $变化从$ 720 $ emu/cm $^3 $到$ 1430 $ emu/cm $^3 $连续弥合$ m_s $的$ m_s $值（如Permalloy和Cofeb）。提出的方法铺平了一种通向具有可控且具有空间变化磁性特性的纳米级2D和3D系统的方法。
Media with engineered magnetization are essential building blocks in superconductivity, magnetism and magnon spintronics. However, the established thin-film and lithographic techniques insufficiently suit the realization of planar components with on-demand-tailored magnetization in the lateral dimension. Here, we demonstrate the engineering of the magnetic properties of CoFe-based nanodisks fabricated by the mask-less technique of focused electron beam induced deposition (FEBID). The material composition in the nanodisks is tuned \emph{in-situ} via the e-beam waiting time in the FEBID process and their post-growth irradiation with Ga ions. The magnetization $M_s$ and exchange stiffness $A$ of the disks are deduced from perpendicular ferromagnetic resonance measurements. The achieved $M_s$ variation in the broad range from $720$ emu/cm$^3$ to $1430$ emu/cm$^3$ continuously bridges the gap between the $M_s$ values of such widely used magnonic materials as permalloy and CoFeB. The presented approach paves a way towards nanoscale 2D and 3D systems with controllable and space-varied magnetic properties.
