Giant enhancement of critical current density at high field in superconducting (Li,Fe)OHFeSe films by Mn doping

POSTER

Abstract

Critical current density (Jc) is one of the major limiting factors for high-field applications of iron-based superconductors. Here, we report that Mn ions are successfully incorporated into nontoxic superconducting (Li,Fe)OHFeSe films. Remarkably, the Jc is significantly enhanced from 0.03 to 0.32MA cm−2 under 33 T, and the vortex pinning force density monotonically increases up to 106 GN m−3, which is the highest record so far among all iron-based superconductors. Our results demonstrate that Mn incorporation is an effective method to optimize the performance of (Li,Fe)OHFeSe films, offering a promising candidate for high-field applications.

*This work was supported by the National Key Research and Development Program of China (Grant Nos. 2017YFA0303003, 2016YFA0300301, 2017YFA0302902, 2018YFB0704102); the National Natural Science Foundation of China (Nos. 11888101, 11834016, 11674374, 11574027); the Strategic Priority Research Program of Chinese Academy of Sciences (XDB25000000), the Strategic Priority Research Program and Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (Grant Nos. QYZDYSSW-SLH001, QYZDY-SSW-SLH008)

Presenters

  • Dong Li

    • Institute of Physics, Chinese Academy of Sciences

Authors

  • Dong Li

    • Institute of Physics, Chinese Academy of Sciences

  • Jie Yuan

    • Institute of Physics, Chinese Academy of Sciences

  • Peipei shen

    • Institute of Physics, Chinese Academy of Sciences

  • Chuangying Xi

    • High Magnetic Field Laboratory, Chinese Academy of Science

  • Jinpeng Tian

    • Institute of Physics, Chinese Academy of Sciences

  • Shunli Ni

    • Institute of Physics, Chinese Academy of Sciences

  • Jingsong Zhang

    • Institute of Physics, Chinese Academy of Sciences

  • Zhongxu Wei

    • Institute of Physics, Chinese Academy of Sciences

  • Wei Hu

    • Institute of Physics, Chinese Academy of Sciences

  • Zian Li

    • Institute of Physics, Chinese Academy of Sciences

  • Li Yu

    • Institute of Physics, Chinese Academy of Sciences

  • Jun Miao

    • School of Materials Science and Engineering, University of Science and Technology Beijing

  • Fang Zhou

    • Institute of Physics, Chinese Academy of Sciences

  • Li Pi

    • High Magnetic Field Laboratory, Chinese Academy of Science

  • Kui Jin

    • Institute of Physics, Chinese Academy of Sciences

  • Xiaoli Dong

    • Institute of Physics, Chinese Academy of Sciences

  • Zhongxian Zhao

    • Institute of Physics, Chinese Academy of Sciences