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arXiv 2202.03123cond-mat.mes-hallnlin.PS
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两种亚稳态磁性霍普夫子

Two types of metastable magnetic hopfions

Konstantin L. Metlov

AI总结:

本文从微磁学哈密顿量出发,解析证明无界块体磁体中霍普夫指数为1的拓扑孤子存在两种拓扑等价但构型不同的稳定态,并在磁场—单轴各向异性空间中绘制了二者的稳定相图。

摘要:

从经典微磁学哈密顿量出发,对无界块体磁体中霍普夫指数为1的局域磁性拓扑孤子进行了理论研究。解析结果表明(类似于经典磁学中的布洛赫壁和奈尔壁),这些孤子存在两种可能的稳定构型,且它们在拓扑上是等价的。在不同归一化静磁相互作用强度下,它们的稳定区域被绘制在磁场—单轴各向异性空间中的相图上。对于某些参数,两种类型的霍普夫子都可以是稳定的。

英文摘要:

Localized magnetic topological solitons with Hopf index of 1 in an unbounded bulk magnet are studied theoretically, starting with the classical micromagnetic Hamiltonian. It is shown analytically that (like Bloch and Néel walls in classical magnetism) there are two possible stable configurations of these solitons, which are equivalent topologically. Their stability regions are plotted on a phase diagram in the magnetic field -- uniaxial anisotropy space for different normalized magnetostatic interaction strengths. For some parameters both types of hopfions can be stable.

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。

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