中国物理B ›› 2018, Vol. 27 ›› Issue (12): 127503-127503.doi: 10.1088/1674-1056/27/12/127503

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Realization of artificial skyrmion in CoCrPt/NiFe bilayers

Yi Liu(刘益), Yong-Ming Luo(骆泳铭), Zheng-Hong Qian(钱正洪), Jian-Guo Zhu(朱建国)   

  1. 1 College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China;
    2 Center for Integrated Spintronic Device, Hangzhou Dianzi University, Hangzhou 310018, China
  • 收稿日期:2018-07-18 修回日期:2018-09-30 出版日期:2018-12-05 发布日期:2018-12-05
  • 通讯作者: Zheng-Hong Qian, Jian-Guo Zhu E-mail:zqian@hdu.edu.cn;nic0400@scu.edu.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant No. 2018YFF01010701), the National Natural Science Foundation of China (Grant No. 51332003), and the Sichuan Science and Technology Program, China (Grant No. 2018G20140).

Realization of artificial skyrmion in CoCrPt/NiFe bilayers

Yi Liu(刘益)1,2, Yong-Ming Luo(骆泳铭)2, Zheng-Hong Qian(钱正洪)1,2, Jian-Guo Zhu(朱建国)1   

  1. 1 College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China;
    2 Center for Integrated Spintronic Device, Hangzhou Dianzi University, Hangzhou 310018, China
  • Received:2018-07-18 Revised:2018-09-30 Online:2018-12-05 Published:2018-12-05
  • Contact: Zheng-Hong Qian, Jian-Guo Zhu E-mail:zqian@hdu.edu.cn;nic0400@scu.edu.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant No. 2018YFF01010701), the National Natural Science Foundation of China (Grant No. 51332003), and the Sichuan Science and Technology Program, China (Grant No. 2018G20140).

摘要:

Skyrmion, as a quasi-particle structure, has attracted much attention due to its potential applications in future spintronic devices. Artificial skyrmion structure has aroused great interest as it can be stabilized at room temperature, without needing to incorporate materials with Dzyaloshinskii-Moriya interaction (DMI) into it. In this paper, it is found that the artificial skyrmion structure can be realized in CoCrPt/NiFe bilayers by micromagnetic simulations. The critical magnetic field of the core decreases as the diameter of the NiFe soft magnetic layer increases. The artificial skyrmion has excellent topological protection, and the critical magnetic field of plane is about 76 mT (760 Oe, 1 Oe=79.5775 A·m-1). The external magnetic field plays a key role in determining the core diameter of the skyrmion, and the artificial skyrmion can be realized in CoCrPt/Cu/CoCrPt/NiFe four-layer with a diameter of 13 nm.

关键词: bilayers, artificial skyrmion, micromagnetic simulations

Abstract:

Skyrmion, as a quasi-particle structure, has attracted much attention due to its potential applications in future spintronic devices. Artificial skyrmion structure has aroused great interest as it can be stabilized at room temperature, without needing to incorporate materials with Dzyaloshinskii-Moriya interaction (DMI) into it. In this paper, it is found that the artificial skyrmion structure can be realized in CoCrPt/NiFe bilayers by micromagnetic simulations. The critical magnetic field of the core decreases as the diameter of the NiFe soft magnetic layer increases. The artificial skyrmion has excellent topological protection, and the critical magnetic field of plane is about 76 mT (760 Oe, 1 Oe=79.5775 A·m-1). The external magnetic field plays a key role in determining the core diameter of the skyrmion, and the artificial skyrmion can be realized in CoCrPt/Cu/CoCrPt/NiFe four-layer with a diameter of 13 nm.

Key words: bilayers, artificial skyrmion, micromagnetic simulations

中图分类号:  (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))

  • 75.70.Cn
75.70.Kw (Domain structure (including magnetic bubbles and vortices)) 75.78.Cd (Micromagnetic simulations ?) 75.50.Ww (Permanent magnets)