Owing to the experimental discovery of magnetic skyrmions stabilized by the Dzyaloshinskii–Moriya and/or dipolar interactions in thin films, there is a recent upsurge of interest in magnetic skyrmions with antiferromagnetic spins in order to overcome the fundamental limitations inherent with skyrmions in ferromagnetic materials. Here, we report on the observation of compact ferrimagnetic skyrmions for the class of amorphous alloys consisting of 4f rare-earth and 3d transition-metal elements with perpendicular magnetic anisotropy, using a DyCo₃ film, that are identified by combining X-ray magnetic scattering, scanning transmission X-ray microscopy, and Hall transport technique. These skyrmions, with antiparallel aligned Dy and Co magnetic moments and a characteristic core radius of about 40 nm, are formed during the nucleation and annihilation of the magnetic maze-like domain pattern exhibiting a topological Hall effect contribution. Our findings provide a promising route for fundamental research in the field of ferrimagnetic/antiferromagnetic spintronics towards practical applications.

中文翻译：

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DyCo3薄膜中致密亚铁磁性天文离子的观察。

由于通过实验发现了由Dzyaloshinskii-Moriya和/或薄膜中的偶极相互作用所稳定的磁性Skyrmion，最近人们对具有反铁磁自旋的磁性Skyrmion产生了兴趣，以克服铁磁性材料中Skyrmion固有的基本局限性。在这里，我们紧凑亚铁磁skyrmions的为类组成的4f稀土金属和具有垂直磁各向异性的3d过渡金属元素的非晶质合金的观察报告，使用DyCo ₃胶片，通过结合X射线磁散射，扫描透射X射线显微镜和霍尔传输技术进行识别。这些具有反平行排列的Dy和Co磁矩且特征核半径约为40 nm的skyrmion，在形似和呈现an灭的磁性迷宫状畴图案的成核和an灭过程中形成，展现了霍尔效应。我们的发现为铁磁性/反磁性自旋电子学领域走向实际应用的基础研究提供了有希望的途径。