High-temperature non-centrosymmetric magnets for skyrmionics
High-temperature non-centrosymmetric magnets for skyrmionics
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DOI：
10.1063/5.0097343
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发表时间：
2022-08
期刊：
影响因子：
6.1
通讯作者：
K. Karube;Y. Taguchi
中科院分区：
文献类型：
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作者：
K. Karube;Y. Taguchi
近年来，磁性斯格明子和反斯格明子等拓扑自旋结构因其丰富的基础物理性质和在下一代磁性器件中的潜在应用而引起了人们的极大兴趣。在应用领域，必须在包括室温在内的广泛温度范围内稳定拓扑自旋纹理，并通过各种外部刺激来操纵它们。在几种具有破缺反演对称性的磁性材料中，由 Dzyaloshinskii-Moriya 相互作用 (DMI) 产生的室温斯格明子和反斯格明子已经取得了重大进展。在这篇《透视》中，我们回顾了具有块状 DMI 的非中心对称磁体的最新进展，该磁体在室温以上容纳斯格明子和反斯格明子。我们首先概述了室温布洛赫型斯格明子及其亚稳定性的稳健性、其形式的多样性以及具有 β-Mn 型手性结构的 Co-Zn-Mn 合金中的动力学。然后，我们重点研究室温反斯格明子及其在具有 D2d 对称性的 Heusler 合金和具有 S4 对称性的 Pd 掺杂 (Fe,Ni)3P 中的拓扑转变。强大的斯格明子和反斯格明子在室温下在这些非中心对称材料中具有多种可调性，代表着朝着长期追求的“斯格明子”里程碑迈出了一步。
Such topological spin textures as magnetic skyrmions and antiskyrmions have attracted significant interest in recent years owing to their rich variety of underlying physics and potential applications in next-generation magnetic devices. In the domain of applications, it is essential to stabilize the topological spin textures over a wide range of temperatures, including room temperature, and manipulate them with various external stimuli. Significant developments have been made in room-temperature skyrmions and antiskyrmions arising from the Dzyaloshinskii–Moriya interaction (DMI) in several magnetic materials with broken inversion symmetry. In this Perspective, we review recent progress in non-centrosymmetric magnets with bulk DMI, which host skyrmions and antiskyrmions above room temperature. We first provide an overview of room-temperature Bloch-type skyrmions and the robustness of their metastability, the variety of their forms, and their dynamics in Co–Zn–Mn alloys with a β-Mn-type chiral structure. We then focus on room-temperature antiskyrmions as well as their topological transformations in Heusler alloys with D2d symmetry and Pd-doped (Fe,Ni)3P with S4 symmetry. The robust skyrmions and antiskyrmions, with versatile tunability in these non-centrosymmetric materials at room temperature, represent a step toward the long-sought milestone of “skyrmionics.”