Intrinsic magnetism has recently been confirmed to survive in bilayer Cr₂Ge₂Te₆. In this work, multiple domain structure and symmetry types and their transformations are firstly discovered in bulk layered Cr₂Ge₂Te₆ crystal using a homebuilt magnetic force microscope (MFM). These transitions occur within a surprisingly narrow temperature range of 2 K and magnetic field range of 0.07 T, which colorful phenomenon hasn't been discovered in other materials but Cr₂Ge₂Te_6. The MFM images show a series of basic domain patterns. Some of them also hasn't been found before, such as self-fitting disks and fine ladder structure within Y-connected walls. The symmetry of these magnetic domain patterns is discussed. The results not only are important in developing new magnetic domain theories but also may show some potential applications in storage depending on the future investigations.

最近证实内在磁性能在双层Cr ₂ Ge ₂ Te _6中存活。在这项工作中，首先使用自制的磁力显微镜（MFM）在块状Cr ₂ Ge ₂ Te ₆层状晶体中发现了多个畴结构和对称类型及其转变。这些转变发生在2 K的狭窄温度范围和0.07 T的磁场范围内，在Cr ₂ Ge ₂ Te _6之外的其他材料中都没有发现这种五颜六色的现象_。MFM图像显示了一系列基本域模式。其中一些以前也没有被发现，例如自安装盘和Y形连接墙内的精细梯子结构。讨论了这些磁畴图案的对称性。这些结果不仅对开发新的磁畴理论很重要，而且根据未来的研究可能会显示出一些潜在的存储应用。