Effects of glucose doping on the MgB2 superconductors using cheap crystalline boron

Abstract We report the effect of glucose (C 6 H 12 O 6 ) doping on the structural and electromagnetic properties of MgB 2 superconductor fabricated by dry mixing using planetary ball milling. Herein, as-prepared bulk polycrystalline Mg (B 1 – x C x ) 2 samples with different doping levels ( x  = 0, 2, 4, and 6 at. %) were systematically studied by X-ray diffraction, magnetic and resistivity measurements, and microstructure analysis. When carbon doped, the reduction in critical transition temperature and shrinkage in a -lattice were obviously observed. This resulted in structural distortion of the MgB 2 lattice, and thereby, enhanced an impurity scattering. In addition to these, upper critical field and high-field critical current densities were also enhanced. On the other hand, both pinning force and low-field critical current density are decreased. The high field enhancement and low field degradation are due to increase in impurity scattering and decrease in pinning force respectively.