Magnetoresistivity and filamentary superconductivity in nickel-doped BaFe<sub>2</sub>As<sub>2</sub>

Magnetoresistivity and filamentary superconductivity in nickel-doped BaFe₂As₂

Zhang Wei^{1, 2}, Dai Yao-Min², Xu Bing², Yang Run², Liu Jin-Yun², Sui Qiang-Tao², Luo Hui-Qian², Zhang Rui², Lu Xing-Ye², Yang Hao^{3, †,}, Qiu Xiang-Gang^{2, ‡,}

(a) Temperature-dependent magnetoresistivity [ρ(9 T) − ρ(0 T)]/ρ(0 T) curves for BaFe_2−xNi_xAs₂ single crystals with x = 0.03, 0.05, 0.065, 0.085, 0.092, and 0.096. Data were offset vertically to separate the overlapped curves between different doping.