Effects of the Two- Gap Nature on the Microwave Conductivity of 39 K Polycrystalline MgB2 Films

Sang Young Lee, J. H. Lee, Jung Hoon Han +4

The surface resistance (Rs) and the real part (sigma_1) of the microwave complex conductivity of a ~380 nm-thick polycrystalline MgB2 film with the critical temperature (Tc) of 39.…