We conducted an integral study based on micromagnetic simulations and experiments to systematically investigate the quasi-static and dynamic magnetic characteristics of Co_xNi_100–x nanodots, varying the Co composition. We compared the magnetic properties of both ideal and real defective circular geometries, employing phase diagrams, hysteresis loops, and magnetization reversal modes for a comprehensive analysis. Our study highlights distinct alterations in coercivity and remanence between ideal and real defective geometries, while the S-mode of reversal is observed in both cases. Notably, our simulations underscore the remarkable sensitivity of magnetic properties to edge defects and the Co content in the alloy. This research underscores the essential role of micromagnetic simulations in tailoring the Co composition of the alloy, thereby fine-tuning the material’s magnetic hardness for enhanced performance in electrochemical applications, particularly as electrodes in energy storage devices.

中文翻译：

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调节 CoxNi100–x 纳米点的磁性：用于定制增强储能设备电化学性能的微磁见解

我们进行了基于微磁模拟和实验的综合研究，系统地研究了改变 Co 成分的 Co _x Ni _{100– x}纳米点的准静态和动态磁特性。我们比较了理想和实际缺陷圆形几何形状的磁特性，采用相图、磁滞回线和磁化反转模式进行全面分析。我们的研究强调了理想和实际缺陷几何形状之间矫顽力和剩磁的明显变化，而在这两种情况下都观察到了 S 模式的反转。值得注意的是，我们的模拟强调了磁性对边缘缺陷和合金中钴含量的显着敏感性。这项研究强调了微磁模拟在调整合金的钴成分方面的重要作用，从而微调材料的磁硬度以增强电化学应用的性能，特别是作为储能设备中的电极。