Curved Nanomagnets: An Archetype for the Skyrmionic States at Ambient Conditions

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-04-10 DOI:10.1021/acs.nanolett.5c00773

Danian A. Dugato, Wesley B. F. Jalil, Ramon Cardias, Marcelo Albuquerque, Marcio Costa, Trevor P. Almeida, Kayla Fallon, András Kovács, Stephen McVitie, Rafal E. Dunin-Borkowski, Flavio Garcia

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Abstract

Stabilizing magnetic skyrmions is a critical issue in spintronics, impacting data storage and computing. This study investigates skyrmion and skyrmionium phenomena within a hexagonal array of curved nanomagnets. Utilizing atomistic calculations, micromagnetic simulations, and experimental methods such as magnetic force microscopy and electron holography, we analyze the interplay between magnetic parameters, curvature, and the interfacial Dzyaloshinskii–Moriya interaction (iDMI) in the formation of these structures. We observed that isolated skyrmions and mixed skyrmionic phases can spontaneously form in a symmetric Pt/Co/Pt multilayer curved nanomagnet matrix without external fields at room temperature. Our findings highlight the considerable influence of geometric curvature on iDMI, providing insights for engineering skyrmionic configurations. This research enhances our understanding of nanomagnetism and contributes to the advancement of skyrmion-based technologies.

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稳定磁性天戎是自旋电子学中的一个关键问题，会对数据存储和计算产生影响。本研究调查了曲面纳米磁体六边形阵列中的天磁和天磁鎓现象。利用原子论计算、微磁模拟以及磁力显微镜和电子全息摄影等实验方法，我们分析了磁参数、曲率和界面 Dzyaloshinskii-Moriya 相互作用（iDMI）在这些结构形成过程中的相互作用。我们观察到，在室温下，对称的铂/钴/铂多层曲面纳米磁体基体中可以在没有外场的情况下自发形成孤立的天电离子和混合天电离子相。我们的研究结果凸显了几何曲率对 iDMI 的巨大影响，为天离子配置的工程设计提供了启示。这项研究加深了我们对纳米磁性的理解，有助于推动基于天电离子技术的发展。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.