论文标题
薄去角质Crgete3膜中的内部和边缘磁化
Interior and edge magnetization in thin exfoliated CrGeTe3 films
论文作者
论文摘要
Crgete3（CGT）是一种半导体的VDW Ferromagnet，其磁性降低到两层厚的样品。尽管CGT是Spintronics设备的主要候选者之一，但目前缺乏对CGT厚度依赖性磁化的全面分析。在这项工作中，我们采用扫描鱿鱼 - STIP（SOT）显微镜来解决4.2 K处的去角质CGT片的磁性特性。将CGT/NBSE2样品的传输测量与SOT图像结合在一起，我们呈现了CGT的磁性纹理和CGT的磁性磁性，从而匹配了CGT的全局cgt结构，以匹配CGT的整体cgt to nimain the domain domain domain domain domain domain domain domain domain domain domain domain。使用这种方法，我们提供了裸膜膜的厚度依赖性磁化态图。没有发现比10 nm厚的膜磁性记忆，并且在临界厚度以下发现了硬铁磁作用。使用扫描SOT显微镜，我们确定了独特的边缘磁性，与CGT内部获得的结果对比。
CrGeTe3 (CGT) is a semiconducting vdW ferromagnet shown to possess magnetism down to a two-layer thick sample. Although CGT is one of the leading candidates for spintronics devices, a comprehensive analysis of CGT thickness dependent magnetization is currently lacking. In this work, we employ scanning SQUID-on-tip (SOT) microscopy to resolve the magnetic properties of exfoliated CGT flakes at 4.2 K. Combining transport measurements of CGT/NbSe2 samples with SOT images, we present the magnetic texture and hysteretic magnetism of CGT, thereby matching the global behavior of CGT to the domain structure extracted from local SOT magnetic imaging. Using this method, we provide a thickness dependent magnetization state diagram of bare CGT films. No zero-field magnetic memory was found for films thicker than 10 nm and hard ferromagnetism was found below that critical thickness. Using scanning SOT microscopy, we identify a unique edge magnetism, contrasting the results attained in the CGT interior.
