Spectroscopy Measurements of Magnesium Diboride Josephson Junctions

MgB$_{2}$ has the highest Tc of the conventional superconductors at 39K and exhibits two superconducting energy bands. This material is also inexpensive to produce and has been utilized in new designs for MRI, RF cavities, and Josephson junctions.~We report results of recent spectroscopy and transport measurements~ of Josephson junctions made of MgB$_{2}$ obtained from our collaborators. We investigate its transport characteristics at sub-kelvin temperatures as well as its responses to resonant microwave activation.