Abstract
In skyrmion-based racetrack memories, the information encoded by skyrmions may be destroyed due to the skyrmion Hall effect, which can be surmounted by using synthetic antiferromagnetic racetracks. Hence, the manipulation of skyrmions in synthetic antiferromagnetic racetracks is important for practical applications. Here, we computationally study the interaction between a pair of skyrmions and a locally modified region in a synthetic antiferromagnetic racetrack, where the perpendicular magnetic anisotropy or thickness is locally adjusted to be different from that of the rest region of the racetrack. It is found that the skyrmions can be attracted, repelled, and even trapped by the locally modified region in a controllable manner. Besides, we demonstrate that the skyrmion location can be precisely determined by the locally modified region. The possible manipulation of skyrmions by utilizing locally modified regions in a synthetic antiferromagnetic racetrack may be useful for future skyrmion-based applications.
| Original language | English |
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| Pages (from-to) | 155-159 |
| Journal | Journal of Magnetism and Magnetic Materials |
| Volume | 482 |
| DOIs | |
| Publication status | Published - 15 Jul 2019 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work was partially supported by CAPES (Finance Code 001), CNPq and FAPEMIG (Brazilian agencies). X.Z. acknowledges the support by the Presidential Postdoctoral Fellowship of the Chinese University of Hong Kong, Shenzhen ( CUHKSZ ). Y.Z. acknowledges the support by the President’s Fund of CUHKSZ, the National Natural Science Foundation of China (Grant No. 11574137 ), and Shenzhen Fundamental Research Fund (Grant Nos. JCYJ20160331164412545 and JCYJ20170410171958839 ). M.E. acknowledges the support by the Grants-in-Aid for Scientific Research from JSPS KAKENHI (Grant Nos. JP18H03676 , JP17K05490 , JP15H05854 ), and also the support by CREST, JST (Grant No. JPMJCR16F1 ).