title: Magnetically modulated critical current densities of Co/Nb hybrid.
abstract: By tuning morphology and size of magnetic subsystem, ferromagnet-superconductor (F/S) hybrid system provides an effective way to modulate superconductivity due to the interaction between superconducting and magnetic-order parameters at the mesoscopic length scale. In this work, we report on investigations of critical current density in a large-area Co/Nb hybrid via facile colloidal lithography. Here, Co hexagon shell array as a magnetic template build on Nb film to modulate the critical current density. A novel superconducting transition has been observed in I-V curve with two metastable transition states: double-transition and binary-oscillation-transition states. Importantly, such unusual behavior can be adjusted by temperature, magnetic field and contact area of F/S. Such hybrid film has important implications for understanding the role of magnetic subsystem modulating superconductivity, as well as applied to low-energy electronic devices such as superconducting current fault limiters.
authors.affiliation: High magnetic field laboratory, Chinese Academy of Sciences, Hefei 230031, P. R. China.|Department of Physics &Electronic Engineering, Taizhou University, Taizhou 318000, China.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Li
authors.affiliation: High magnetic field laboratory, Chinese Academy of Sciences, Hefei 230031, P. R. China.|Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.
authors.forename: Weike
authors.initials: W
authors.lastname: Wang
authors.affiliation: Department of Physics &Electronic Engineering, Taizhou University, Taizhou 318000, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: High magnetic field laboratory, Chinese Academy of Sciences, Hefei 230031, P. R. China.|Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Zhaorong
authors.initials: Z
authors.lastname: Yang
authors.affiliation: High magnetic field laboratory, Chinese Academy of Sciences, Hefei 230031, P. R. China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Mingliang
authors.initials: M
authors.lastname: Tian
authors.affiliation: High magnetic field laboratory, Chinese Academy of Sciences, Hefei 230031, P. R. China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Yuheng
authors.initials: Y
authors.lastname: Zhang