Study of Superconducting Magnesium Diboride at milli-Kelvin Temperatures

The superconducting properties of magnesium diboride (MgB$_{2})$ were first discovered in 2001 and since then many studies of this interesting material have been performed. MgB$_{2}$ has a transition temperature of 40K and has been typically studied down to around 4.0K. We report results of recent current-voltage measurements, at milli-Kelvin temperatures, of MgB$_{2}$-based Josephson junctions obtained from our collaborators [1]. We investigate its I-V characteristics and the structure of its sub-gap resistance.\\[4pt] [1] Samples were obtained from Prof. Xiaoxing Xi's Research group at Temple University.