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    Modulation of interface magnetic anisotropy and Dzyaloshinskii-Moriya interaction by carbon doping in Co/Pt multilayers

    Jiawei Wang1,*, Yongshuai Zhang1, Dengwang Zhang1, Qiong Peng2,†, Xiukun Hu3, Meishi Li4, Sen Zhang5, Guoliang Yu1, Yang Qiu1 et al.

    Yan Li1, Mingmin Zhu1, Haoliang Liu4, and Hao-Miao Zhou1,‡

    • 1Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of Information Engineering, China Jiliang University, Hangzhou 310018, People's Republic of China
    • 2The Key Laboratory of Micro-nano Energy Materials and Application Technologies, University of Hunan Province & College of Physics and Electronic Engineering, Hengyang Normal University, Hengyang 421002, People's Republic of China
    • 3College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, People's Republic of China
    • 4Guangdong Provincial Key Laboratory of Semiconductor, Optoelectronic Materials, and Intelligent Photonic Systems, School of Integrated Circuit, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People's Republic of China
    • 5College of Science, National University of Defense Technology, Changsha 410073, People's Republic of China

    • *Contact author: wangjiawei@cjlu.edu.cn
    • †Contact author: pq@hynu.edu.cn
    • ‡Contact author: zhouhm@cjlu.edu.cn
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    Phys. Rev. B 114, 084417 – Published 19 August, 2026

    DOI: https://doi.org/10.1103/hfv5-tr7y

    Abstract

    We report carbon doping modulation of interface magnetic anisotropy and Dzyaloshinskii-Moriya (DM) interaction in the Co/Pt multilayers with different Co sublayer thicknesses. A doping-driven spin reorientation transition (SRT) in Co/Pt multilayers was demonstrated. The separation of bulk and interface magnetic anisotropy revealed that the carbon doping preferentially disrupted the Co/Pt interface. The existence of DM interaction is confirmed by the anomalous Hall effect and Brillouin light scattering spectroscopy measurements. The competition between the perpendicular magnetic anisotropy and the DM interaction induces the domain transition from droplet to dendritic domain, which is observed by a polar magneto-optical Kerr effect microscope and reproduced by micromagnetic simulations with material-specific parameters. First-principles calculations are used to understand the doping-driven SRT. The lattice volume variation of the Co sublayer and the increase of average interlayer spacing d are responsible for the bulk and interface magnetic anisotropy reduction, respectively. This work establishes doping with metalloid elements as an effective approach for significant modulating magnetism in multilayers and provides insights for designing potential spintronic materials via doping-engineered magnetic properties.

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    Phys. Rev. B 114, 084417– Published 19 August, 2026
    • Received 16 February 2026
    • Revised 25 June 2026
    • Accepted 20 July 2026
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