Determination of irreversibility fields and superconducting parameters in BaPb0.75Bi0.25O3
D. N. Zheng, Z. X. Zhao, A. M. Campbell
DOI 10.1103/PhysRevB.61.14804 · Physical Review B
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Abstract
The dc magnetization of a superconducting BaPb0.75Bi0.25O3 sample has been measured as a function of magnetic field and temperature. The results showed that an irreversibility line lies considerably below the superconducting normal phase transition boundary Bc2(T), similar to that commonly observed in high-temperature superconductors, even though BaPb0.75Bi0.25O3 displays a very long coherence length. We attributed the observed large magnetically reversible region to a very small thermodynamic field, which leads to low condensation energies. The reversible magnetization data obtained in the region above the irreversibility line enable us to determine a full set of superconducting parameters for the material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaPb0.75Bi0.25O3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.6 | Pressure not reported | onset |
| Ba(Pb1-xBix)O3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13 | Pressure not reported | unknown |
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