Superconducting properties of nanocrystalline MgB<sub>2</sub>
Superconducting properties of nanocrystalline MgB<sub>2</sub>
Nanocrystalline MgB$_2$ produced by mechanical alloying has been shown to exhibit enhanced superconducting properties such as increased pinning and higher critical currents. However, the effects of the synthesis process on the intrinsic superconducting properties have not been addressed yet. We have investigated the superconducting gap structure of nanocrystalline MgB$_2$ pellets …