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Computational search for ultrasmall and fast skyrmions in the Inverse Heusler family
IEEE Transactions on Magnetics ( IF 2.1 ) Pub Date : 2020-07-01 , DOI: 10.1109/tmag.2020.2992705
Yunkun Xie , Jianhua Ma , Hamed Vakilitaleghani , Yaohua Tan , Avik W. Ghosh

Skyrmions are magnetic excitations that are potentially ultrasmall and topologically protected, thus making them interesting for high-density all-electronic ultrafast storage applications. While recent experiments have confirmed the existence of various types of skyrmions, their typical sizes are much larger than traditional domain walls, except at very low temperature. In this article, we explore the optimal material parameters for hosting ultrasmall, fast, and room temperature stable, isolated Neel (hedgehog) skyrmions. As concrete examples, we explore potential candidates from the inverse Heusler family. Using first-principles calculations of structural and magnetic properties, we identify several promising ferrimagnetic inverse Heusler half-metal/near half-metals and analyze their phase space for size and metastability.

中文翻译:

逆赫斯勒家族中超小和快速斯格明子的计算搜索

Skyrmions 是一种潜在的超小且受拓扑保护的磁激发,因此它们对高密度全电子超快存储应用很有吸引力。虽然最近的实验已经证实了各种类型的斯格明子的存在,但它们的典型尺寸比传统畴壁大得多,除了在非常低的温度下。在本文中,我们探讨了承载超小、快速和室温稳定、孤立的 Neel(刺猬)斯格明子的最佳材料参数。作为具体的例子,我们探索了来自逆 Heusler 家族的潜在候选者。使用结构和磁性的第一性原理计算,我们确定了几种有前途的亚铁磁逆赫斯勒半金属/近半金属,并分析了它们的相空间尺寸和亚稳态。
更新日期:2020-07-01
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