The doping effect of diamond nanoparticles on the superconducting properties of MgB2 bulk material has been studied. It is found that the superconducting transition temperature Tc of MgB2 is suppressed by the diamond doping, however, the irreversibility field Hirr and the critical current density Jc are systematically enhanced. Microstructural analysis shows that the diamond-doped MgB2 superconductor consists of tightly-packed MgB2 nano-grains (∼50-100 nm) with highly dispersed and uniformly distributed diamond nanoparticles (∼10-20 nm) inside the grains. The highly density of dislocations and diamond nanoparticles may be responsible for the enhanced flux pinning in the diamond-doped MgB2.
ASJC Scopus subject areas
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry
Doping effect of nano-diamond on superconductivity and flux pinning in MgB2. / Cheng, C. H.; Zhang, H.; Zhao, Y.; Feng, Y.; Rui, X. F.; Munroe, P.; Zeng, H. M.; Koshizuka, N.; Murakami, M.In: Superconductor Science and Technology, Vol. 16, No. 10, 01.10.2003, p. 1182-1186.
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