Experimental realization of two-dimensional artificial skyrmion crystals at room temperature

被引：81
|
作者：
Miao, B. F. [1 ,2 ]
Sun, L. [1 ,2 ]
Wu, Y. W. [1 ,2 ]
Tao, X. D. [1 ,2 ]
Xiong, X. [1 ,2 ]
Wen, Y. [1 ,2 ]
Cao, R. X. [1 ,2 ]
Wang, P. [1 ,2 ]
Wu, D. [1 ,2 ]
Zhan, Q. F. [3 ]
You, B. [1 ,2 ]
Du, J. [1 ,2 ]
Li, R. W. [3 ]
Ding, H. F. [1 ,2 ]
机构：
[1] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
[3] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China
来源：
PHYSICAL REVIEW B | 2014年 / 90卷 / 17期
基金：
中国国家自然科学基金;
关键词：
WEAK FERROMAGNETISM; MAGNETIC SKYRMIONS; PERMALLOY; FIELD; DOTS; REVERSAL;
D O I：
10.1103/PhysRevB.90.174411
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：5
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