arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.06772cond-mat.str-el
收藏

单轴铁磁体中双克尔离子的三维结构和形成机制

Three-dimensional structure and formation mechanism of biskyrmions in uniaxial ferromagnets

Cheng-Jie Wang, Pengfei Wang, Yan Zhou, Wenhong Wang, Fazhan Shi, Jiangfeng Du

摘要:

磁性双回旋子在实验中被观察到,但它们的存在仍然存在争议。在这项工作中,我们提出的存在的biskyrmions的磁性薄膜倾斜单轴各向异性通过微磁学模拟。我们发现biskyrmions和bubbles共享一个统一的三维结构,其中两个内禀Bloch点的相对位置决定了膜中间的二维拓扑性质。薄膜边缘可以驱动布洛赫点,并通过退磁场将气泡转变为双克尔介子。在零场约束条件下双克尔米子的形成过程中发现了这种机制。我们的工作阐明了biskyrmion的结构和形成机制,强调skyrmion相关的纳米结构的三维方面。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑