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, ‡,}

The temperature-dependent normalized resistivity ρ(T)/ρ(300 K) curves for BaFe_2−xNi_xAs₂ single crystals with x = 0.03 and x = 0.10. Top inset: the enlarged view of ρ(T)/ρ(300 K) curve for underdoped x = 0.03 sample; Bottom inset: the derivative curve dρ/dT for x = 0.03 sample.