A comparative study of microwave power handling capabilities of Tl-1212 and Hg-1212 superconducting microstrip lines

摘要

The microwave power handing capability Pc of the microstrip lines of the isomorphic '1212' pair is studied for the superconductors TlBa2CaCu2O7 and HgBa2CaCu2O6+delta d at >= 77 K. The Pc for the pair follows the same temperature dependence at a reduced temperature scale (t = T/T-c). A comparison of the dc critical current density J(c) and the radio-frequency one J(rf) derived from the P-c of the '1212' pair reveals a similar reduced temperature dependence, suggesting that the depinning of the magnetic vortices, which is dictated by the '1212' structure, pays a similar role in limiting J(c) and J(rf) in the proximity of T-c.