Skyrmionic spin configurations, including skyrmions and skyrmionic bubbles, have attracted much attention for their intriguing magneto-electrical properties. To date, most skyrmionic spin configurations are observed in transition metal based magnets, the correlations between topological structures and f orbital electrons are still unclear due to the lack of rare earth (RE) based magnets hosting skyrmionic spin configurations, especially at room temperature. Here, a family of RE-based intermetallics compounds, REMn₂Ge₂ (RE = Ce, Pr, and Nd) magnets, are demonstrated to be able to host skyrmionic bubbles in a wide temperature range of 220–320 K. By further applying a field-cooling procedure, high-density hexagonal lattices of skyrmionic bubbles are realized under zero magnetic field. By combing the micromagnetic simulations, the rotation of easy-magnetized axis plays a dominated role for present REMn₂Ge₂ magnets, plays a dominated role in the temperature and field induced magnetic domain evolutions. The skyrmionic spin configurations observed in the RE-based magnets can overcome the limiting factors in terms of material variations, operating temperature, and working magnetic field, which is of great significance to practical applications of the skyrmionic spin configurations.

天体离子自旋构型，包括天体离子和天体离子气泡，因其吸引人的磁电特性而备受关注。迄今为止，大多数skyrmionic自旋配置在过渡金属基磁体观察，拓扑结构之间和的相关性˚F轨道电子仍然缺乏稀土（RE）托管skyrmionic自旋配置基于磁体因不明确，特别是在室温下。在这里，一族稀土基金属间化合物REMn ₂ Ge ₂（RE = Ce，Pr和Nd）磁体被证明能够在220–320 K的宽温度范围内容纳天体离子气泡。通过进一步应用现场冷却程序，可以得到高密度的天体离子气泡六角形晶格在零磁场下实现。通过结合微磁模拟，易磁化轴的旋转在目前的REMn ₂ Ge ₂磁体中起主导作用，在温度和磁场感应的磁畴演化中起主导作用。在稀土基磁体中观察到的空中离子自旋构型可以克服材料变化，工作温度和工作磁场方面的限制因素，这对于空中离子自旋构型的实际应用具有重要意义。