Substitution induced pinning in MgB_2 superconductor doped with SiC nano-particles
arXiv:cond-mat/0206444 · doi:10.1088/0953-2048/15/11/317
Abstract
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 in the sample MgB_2(SiC)_x having x = 0.34, the highest doping level prepared, dropped only by 2.6 K.
4 pages, 6 figures
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- Superconductivity, critical current density, and flux pinning in MgB_{2-x}(SiC)_{x/2} superconductor after SiC nanoparticle doping
- Properties of superconducting MgB_2 wires: "in-situ" versus "ex-situ" reaction technique
- Improvement of critical current density in Fe-sheathed MgB2 tapes by ZrSi2, ZrB2 and WSi2 doping
- Irreversibility Field and Flux Pinning in MgB2 with and Without SiC Additions
- Superconductivity of bulk MgB2 + nano(n)-SiC composite system: A high field magnetization study
- Effect of synthesis temperature on superconducting properties of n-SiC added bulk MgB2 superconductor
- Transport and magnetic Jc of MgB2 strands and small helical coils
- In situ annealing of superconducting MgB2 films prepared by pulsed laser deposition
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- Influence of the carbon substitution on the critical current density and AC losses in MgB2 single crystals
- Effects of carbon concentration and filament number on advanced internal-Mg-infiltration-processed MgB2 Strands