Wang Shaobo, Zeng Qingwen, Liu Danmin, Zhang Hongguo, Ma Lin, Xu Guoliang, Liang Yuntian, Zhang Zhenlu, Wu Hui, Che Renchao, Han Xiaodong, Huang Qingzhen
Beijing Key Laboratory of Microstructure and Properties of Advanced Material, Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China.
Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China.
ACS Appl Mater Interfaces. 2020 May 27;12(21):24125-24132. doi: 10.1021/acsami.0c04632. Epub 2020 May 14.
Skyrmions with topologically nontrivial spin textures are promising information carriers in next-generation ultralow power consumption and high-density spintronic devices. To promote their further development and utilization, the search for new room temperature skyrmion-hosting materials is crucial. Considering that most of the previous skyrmion-hosting materials are noncollinear magnets, here, the detection of the topological Hall effect (THE) and the discovery of skyrmions at room temperature are first reported in a centrosymmetric complex noncollinear ferromagnet NdMnGe. Below 330 K, the compound can host stable Bloch-type skyrmions with about 75 nm diameter in a wide window of magnetic field and temperature, including zero magnetic field and room temperature. Moreover, the skyrmions can induce a giant topological Hall effect in a wide temperature range with a maximum value of -2.05 μΩ cm. These features make the compound attractive for both fundamental research and potential application in novel spintronic devices.
具有拓扑非平凡自旋纹理的斯格明子是下一代超低功耗和高密度自旋电子器件中很有前景的信息载体。为了促进它们的进一步开发和利用，寻找新的室温斯格明子承载材料至关重要。考虑到之前的大多数斯格明子承载材料都是非共线磁体，在此首次报道了在中心对称的复杂非共线铁磁体NdMnGe中室温下拓扑霍尔效应（THE）的检测以及斯格明子的发现。在330 K以下，该化合物能够在包括零磁场和室温在内的宽磁场和温度窗口中承载直径约75 nm的稳定布洛赫型斯格明子。此外，斯格明子能够在宽温度范围内诱导出高达-2.05 μΩ cm的巨大拓扑霍尔效应。这些特性使得该化合物对于基础研究以及新型自旋电子器件的潜在应用都具有吸引力。
