Universal helimagnon and skyrmion excitations in metallic, semiconducting and insulating chiral magnets
Universal helimagnon and skyrmion excitations in metallic, semiconducting and insulating chiral magnets
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DOI：
10.1038/nmat4223
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发表时间：
2015-05-01
期刊：
影响因子：
41.2
通讯作者：
Grundler, D.
中科院分区：
文献类型：
--
作者：
Schwarze, T.;Waizner, J.;Grundler, D.
近七十年来对磁性材料的微波激发的研究已经导致了电子学中的广泛应用（1-4）。最近在手性磁体中发现的拓扑自旋孤子，即所谓的skyrmions（5-9），有望开发出利用这些化合物的特殊涌现电动力学的高频器件（10-14）。因此，准确和统一的定量计算其谐振响应是关键。在这里，我们报告的集体自旋激发在金属，半导体和绝缘手征磁体MnSi，Fe 1-xCoxSi和Cu 2 OSeO 3，分别使用宽带共面波导的全电子光谱。通过考虑偶极相互作用，我们实现了一个精确的定量建模在整个磁相图使用两个材料的具体参数，量化的手性和临界场能量。通用的行为为基于手性磁体的共振响应的特定应用奠定了基础，手性磁体具有定制的电导率和与电子集成的前所未有的自由度。
Nearly seven decades of research on microwave excitations of magnetic materials have led to a wide range of applications in electronics(1-4). The recent discovery of topological spin solitons in chiral magnets, so-called skyrmions(5-9), promises high-frequency devices that exploit the exceptional emergent electrodynamics of these compounds(10-14). Therefore, an accurate and unified quantitative account of their resonant response is key. Here, we report all-electrical spectroscopy of the collective spin excitations in the metallic, semiconducting and insulating chiral magnets MnSi, Fe1-xCoxSi and Cu2OSeO3, respectively, using broadband coplanar waveguides. By taking into account dipolar interactions, we achieve a precise quantitative modelling across the entire magnetic phase diagrams using two material-specific parameters that quantify the chiral and the critical field energy. The universal behaviour sets the stage for purpose-designed applications based on the resonant response of chiral magnets with tailored electric conductivity and an unprecedented freedom for an integration with electronics.