Multiple domain structure and symmetry types in narrow temperature and magnetic field ranges in layered Cr2Ge2Te6 crystal measured by magnetic force microscope
Multiple domain structure and symmetry types in narrow temperature and magnetic field ranges in layered Cr2Ge2Te6 crystal measured by magnetic force microscope
复制标题
磁力显微镜测量层状Cr2Ge2Te6晶体在窄温度和磁场范围内的多畴结构和对称类型
DOI：
10.1016/j.matchar.2021.110913
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发表时间：
2021-02-16
影响因子：
4.7
通讯作者：
Lu, Qingyou
中科院分区：
文献类型：
--
作者：
Guo, Tengfei;Ma, Zongwei;Lu, Qingyou
本征磁性最近被证实存在于双层膜Cr2Ge2Te6中。利用自制的磁力显微镜(MFM)首次在块状层状Cr2Ge2Te6晶体中发现了多种磁畴结构和对称性类型及其相变。这些转变发生在令人惊讶的2K温度范围和0.07T的磁场范围内，除了Cr2Ge2Te6之外，其他材料中还没有发现这种多彩的现象。MFM图像显示了一系列基本的域模式。其中一些也是以前没有发现的，比如Y形连接墙内的自适应圆盘和精细的梯形结构。讨论了这些磁畴图案的对称性。这些结果不仅对发展新的磁畴理论具有重要意义，而且还可能在未来的研究中显示出一些潜在的存储应用。
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 Cr2Ge2Te6. 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.