Improved Irreversibility Behaviour and Critical Current Density in MgB2-Diamond Nanocomposites

Abstract

MgB2-diamond nanocomposite superconductors have been synthesized by addition of nano-diamond powder. Microstructural analysis shows that the nanocomposite 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 Jc-H and Hiir-T characteristics have been significantly improved in this MgB2-diamond nanocomposite, compared to MgB2 bulk materials prepared by other techniques. Also, the Jc value of 1x104 A/cm2 at 20 K and 4 T and the Hirr value of 6.4 T at 20 K have been achieved

9 pages, 5 figures

References in corpus (4)

• Thin Film Magnesium Boride Superconductor with Very High Critical Current Density and Enhanced Irreversibility Field
• Single crystal MgB2 with anisotropic superconducting properties
• High Critical Current Density and Improved Irreversibility Field in Bulk MgB2 Made By A Scaleable, Nanoparticle Addition Route
• Intralayer Carbon Substitution in the MgB2 Superconductor

Cited by in corpus (5)

• Carbon substitution in MgB2 single crystals: structural and superconducting properties
• Significantly enhanced critical current densities in MgB2 tapes made by a scaleable, nano-carbon addition route
• Prospects for Improving the Intrinsic and Extrinsic Properties of Magnesium Diboride Superconducting Strands
• Strong influence of precursor powder on the critical current density of Fe-sheathed MgB2 tapes
• Development of Doped MgB2 Wires and Tapes for Practical Applications