方形铁磁纳米环剩磁态的调谐

IF 1.1 4区物理与天体物理 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Magnetics Letters Pub Date : 2026-01-01 Epub Date: 2026-03-16 DOI:10.1109/LMAG.2026.3674354

Ceziana Pereira da Costa;Ana Lucia Dantas;Artur da Silva Carriço

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引用次数: 0

摘要

我们提出了方形铁和坡莫合金纳米材料中剩磁态的微磁研究，强调了场历史和几何约束的作用。通过使环在不同的场取向下饱和并将场减小到零，得到了剩余构型。结果显示出强烈的路径依赖性：对角线饱和和垂直饱和分别稳定了洋葱状和旋涡状态，而边缘场饱和诱导了屈曲状、平面内旋涡和全三维旋涡状态之间的过渡。相图显示，这些转变主要是由静磁相互作用控制的，在铁中由于其较高的饱和磁化强度而具有更强的作用。这些发现提供了一种与多态磁和自旋电子应用相关的方形纳米结构的确定性剩余态选择策略。

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Tuning the Remanent Magnetic State in Square Ferromagnetic Nanorings

We present a micromagnetic study of remanent magnetic states in square Fe and Permalloy nanorings, emphasizing the roles of field history and geometric confinement. Remanent configurations are obtained by saturating the rings under different field orientations and reducing the field to zero. The results reveal strong path dependence: diagonal and perpendicular saturation stabilize onion-like and vortex states, respectively, whereas edge-field saturation induces transitions among buckle-like, in-plane vortex, and fully three-dimensional vortex states. Phase diagrams show that these transitions are governed primarily by magnetostatic interactions, with stronger effects in Fe due to its higher saturation magnetization. These findings provide a strategy for deterministic remanent-state selection in square nanorings, relevant to multistate magnetic and spintronic applications.

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来源期刊

IEEE Magnetics Letters PHYSICS, APPLIED-

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： IEEE Magnetics Letters is a peer-reviewed, archival journal covering the physics and engineering of magnetism, magnetic materials, applied magnetics, design and application of magnetic devices, bio-magnetics, magneto-electronics, and spin electronics. IEEE Magnetics Letters publishes short, scholarly articles of substantial current interest. IEEE Magnetics Letters is a hybrid Open Access (OA) journal. For a fee, authors have the option making their articles freely available to all, including non-subscribers. OA articles are identified as Open Access.