A new approach involving the use of fluorides has been adopted to synthesize phase-pure Pb-substituted Hg-1223 superconductors under ambient conditions. A representative sample is characterized using x-ray, SQUID magnetometer, and ac susceptibility techniques. In a measuring field of 1 G, a sharp diamagnetic onset is observed at 132 K and perfect flux screening persists up to 122 K. On approaching Tc the irreversibility llle follows a power law with exponent α=2.2. From the ac susceptibility data, in the context of the Bean critical state model, the critical current density at helium temperatures is estimated to be 1.5×106 A/cm2.
|Original language||English (US)|
|Number of pages||3|
|Journal||Journal of Applied Physics|
|Issue number||8 PART 2B|
|State||Published - Apr 15 1996|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)