The microwave absorption in the superconducting state of single-phase Hg0.7Pb0.3Ba2Ca2Cu3O8+x havi ng a Tc of 133 K is shown to depend linearly on the square root of the DC magnetic field strength with a change of slope occuring at a DC magnetic field B* which corresponds to an onset of an irreversibility in the field dependence of the microwave absorption. A measurement of the temperature dependence of B* enables a determination of an H-T irreversibility line at 9.2 GHz. A comparison of the magnetic-field-induced dissipation with that the Y-Ba-Cu-O indicates that the Hg-Pb-Ba-Ca-Cu-O material has a larger pinning barrier to flux detrapping at 77 K.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering