Experimental realization of two-dimensional artificial skyrmion crystals at room temperature
Experimental realization of two-dimensional artificial skyrmion crystals at room temperature
复制标题
室温二维人造斯格明子晶体的实验实现
DOI：
10.1103/physrevb.90.174411
复制
发表时间：
2014-11-11
影响因子：
3.7
通讯作者：
Ding, H. F.
中科院分区：
文献类型：
--
作者：
Miao, B. F.;Sun, L.;Ding, H. F.
我们报告的人工skyrmion晶体，这是在室温下可靠地配置创建。通过将光刻图案化的微米尺寸的Co盘阵列嵌入到具有垂直磁各向异性的Co/Pt多层膜上来制造样品。Kerr显微镜和磁力显微镜观察到盘处于可控环量的涡旋状态。通过比较测量的磁滞回线和计算的磁滞回线，我们发现，样品可以配置成skyrmion或非skyrmion状态。在室温下可重复且稳定的skyrmion晶体为直接探索其独特的拓扑性质打开了大门，这理所当然地引起了一系列理论活动。
We report the creation of an artificial skyrmion crystal, which is configurable reliably at room temperature. The samples are fabricated by embedding lithography-patterned arrays of micron-sized Co disks onto Co/Pt multilayer films that have perpendicular magnetic anisotropy. Kerr microscopy and magnetic force microscopy reveal that the disks are in the vortex state with controllable circulation. Via comparison of measured hysteresis loops and calculated ones, we find that the sample can be configured into either a skyrmion or a non-skyrmion state. The reproducible and stable skyrmion crystal at room temperature opens the door to direct exploration of their unique topological properties, which has deservedly caused a flurry of theoretical activity.