论文标题
单轴铁磁体中Biskyrmions的三维结构和形成机理
Three-dimensional structure and formation mechanism of biskyrmions in uniaxial ferromagnets
论文作者
论文摘要
在实验中观察到磁性biskyrmions，但它们的存在仍在争论中。在这项工作中，我们介绍了通过微磁模拟的磁性薄膜中的Biskyrmions的存在。我们发现Biskyrmions和Bubbles具有统一的三维结构，其中两个固有的Bloch点的相对位置主导了膜中间的二维拓扑特性。薄膜边缘可以通过撤电场将气泡驱动并将气泡转变为Biskyrmions。这种机制在零场下的受约束几何形状的biskyrmions的形成过程中找到。我们的工作阐明了Biskyrmions的结构和形成机理，强调了与Skyrmion相关的纳米结构的三维方面。
Magnetic biskyrmions are observed in experiments but their existences are still under debate. In this work, we present the existence of biskyrmions in a magnetic film with tilted uniaxial anisotropy via micromagnetic simulations. We find biskyrmions and bubbles share a unified three-dimensional structure, in which the relative position of two intrinsic Bloch points dominates the two-dimensional topological property in the film middle. The film edge can drive Bloch points and transform bubbles into biskyrmions via the demagnetizing field. This mechanism is found in the formation process of biskyrmions in confined geometry under zero field. Our work clarifies the structure and formation mechanism of biskyrmions, emphasizing the three-dimensional aspect of skyrmion-related nanostructures.
