journal article·2023-03-08

Local Manipulation of Skyrmion Nucleation in Microscale Areas of a Thin Film with Nitrogen-Ion Implantation

Yongkang Zhao, Junlin Wang, Lianxin Xu, Peiyue Yu, Mingxuan Hou, Fei Meng, Shuai Xie, Yufei Meng, Ronggui Zhu, Zhipeng Hou, Meiyin Yang, Jun Luo, Jing Wu, Yongbing Xu, Xingsen Gao, Chun Feng, Guanghua Yu

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Abstract

Precise manipulation of skyrmion nucleation in microscale or nanoscale areas of thin films is a critical issue in developing high-efficient skyrmionic memories and logic devices. Presently, the mainstream controlling strategies focus on the application of external stimuli to tailor the intrinsic attributes of charge, spin, and lattice. This work reports effective skyrmion manipulation by controllably modifying the lattice defect through ion implantation, which is potentially compatible with large-scale integrated circuit technology. By implanting an appropriate dose of nitrogen ions into a Pt/Co/Ta multilayer film, the defect density was effectively enhanced to induce an apparent modulation of magnetic anisotropy, consequently boosting the skyrmion nucleation. Furthermore, the local control of skyrmions in microscale areas of the macroscopic film was realized by combining the ion implantation with micromachining technology, demonstrating a potential application in both binary storage and multistate storage. These findings provide a new approach to advancing the functionalization and application of skyrmionic devices.
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Research context

OpenAlex topics: Magnetic properties of thin films · Advanced Memory and Neural Computing · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

School of Integrated Circuits, Guangdong University of Technology, Guangzhou 510006, China

Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China

Key Laboratory of Microelectronic Devices and Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences (IMECAS), Beijing 100029, China

York-Nanjing International Center of Spintronics (YNICS), York University, York YO10 3LT, U.K.

Funding

Guangdong Science and Technology Department · Ministry of Science and Technology of the People's Republic of China · Youth Innovation Promotion Association of the Chinese Academy of Sciences · National Natural Science Foundation of China · Chinese Academy of Sciences · Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing · Foshan City

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