Bezsmertna Olha, Xu Rui, Pylypovskyi Oleksandr, Raftrey David, Sorrentino Andrea, Fernandez-Roldan Jose Angel, Soldatov Ivan, Wolf Daniel, Lubk Axel, Schäfer Rudolf, Fischer Peter, Makarov Denys
Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.
Kyiv Academic University, 03142 Kyiv, Ukraine.
Nano Lett. 2024 Dec 11;24(49):15774-15780. doi: 10.1021/acs.nanolett.4c04584. Epub 2024 Nov 26.
Curvilinear magnetism emerged as a new route to tailor properties of magnetic solitons by the choice of geometry and topology of a magnetic architecture. Here, we develop an anodized aluminum oxide template-based approach to realize hierarchical 3D magnetic nanoarchitectures of nanoflower shape. The technique provides defect-free regular arrays of magnetic nanoflowers of tunable shape with a period of 400 nm over cm areas. We combined advanced magnetic imaging methods with micromagnetic simulations to study complex magnetic states in nanoflowers originating due to magnetostatics-driven symmetry break in curvilinear nanomembranes. An interaction between surface and volume magnetostatic charges in 3D curved nanoflowers leads to the stabilization of asymmetric and shifted vortices as well as states with two Bloch lines. Ordered large area arrays of complex-shaped magnetic nanoarchitectures developed in this work are relevant for prospective research on 3D magnonics and spintronics.
曲线磁性作为一种通过选择磁结构的几何形状和拓扑结构来定制磁孤子特性的新途径而出现。在此，我们开发了一种基于阳极氧化铝模板的方法来实现纳米花形状的分级三维磁性纳米结构。该技术可在厘米级区域上提供形状可调的无缺陷规则排列的磁性纳米花阵列，周期为400纳米。我们将先进的磁成像方法与微磁模拟相结合，以研究由于曲线纳米膜中静磁驱动的对称性破缺而产生的纳米花中的复杂磁态。三维弯曲纳米花中表面和体静磁电荷之间的相互作用导致不对称和移位涡旋以及具有两条布洛赫线的状态的稳定。这项工作中开发的有序大面积复杂形状磁性纳米结构阵列与三维磁振子学和自旋电子学的前瞻性研究相关。
