Substitution-induced pinning in MgB2 superconductor doped with SiC nano-particles
作者： SX Dou , AV Pan , S Zhou , M Ionescu , HK Liu
DOI: 10.1088/0953-2048/15/11/317
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摘要: By doping MgB 2 superconductor with SiC nano-particles, we have successfully introduced pinning sites directly into the crystal lattice of MgB 2 grains (intra-grain pinning). It became possible due to the combination of counter-balanced Si and C co-substitution for B, leading to a large number of intra-granular dislocations and the dispersed nano-size impurities induced by the substitution. The magnetic field dependence of the critical current density was significantly improved in a wide temperature range, whereas the transition temperature …
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