Ran Kejing, Liu Yizhou, Guang Yao, Burn David M, van der Laan Gerrit, Hesjedal Thorsten, Du Haifeng, Yu Guoqiang, Zhang Shilei
School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China.
ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 200031, China.
Phys Rev Lett. 2021 Jan 8;126(1):017204. doi: 10.1103/PhysRevLett.126.017204.
A chiral bobber is a localized three-dimensional magnetization configuration, terminated by a singularity. Chiral bobbers coexist with magnetic skyrmions in chiral magnets, lending themselves to new types of skyrmion-complementary bits of information. However, the on-demand creation of bobbers, as well as their direct observation remained elusive. Here, we introduce a new mechanism for creating a stable chiral bobber lattice state via the proximity of two skyrmion species with comparable size. This effect is experimentally demonstrated in a Cu_{2}OSeO_{3}/[Ta/CoFeB/MgO]{4} heterostructure in which an exotic bobber lattice state emerges in the phase diagram of Cu{2}OSeO_{3}. To unambiguously reveal the existence of the chiral bobber lattice state, we have developed a novel characterization technique, magnetic truncation rod analysis, which is based on resonant elastic x-ray scattering.
手性泡是一种由奇点终止的局域三维磁化结构。手性泡在手性磁体中与磁斯格明子共存，为新型斯格明子互补信息位提供了可能。然而，手性泡的按需产生及其直接观测仍然难以实现。在此，我们介绍一种通过两种尺寸相近的斯格明子的接近来创建稳定手性泡晶格态的新机制。这种效应在Cu₂OSeO₃/[Ta/CoFeB/MgO]₄异质结构中得到了实验证明，其中在Cu₂OSeO₃的相图中出现了一种奇异的泡晶格态。为了明确揭示手性泡晶格态的存在，我们开发了一种基于共振弹性X射线散射的新型表征技术——磁截断杆分析。
