Superconductivity above 100 K by Pr substitution in the two-copper-layer Bi-Pb-Sr-Ca-Cu-O system
A. Gama, E. Chavira, R. Escudero
DOI 10.1103/PhysRevB.42.2161 · Physical Review B
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Abstract
The effect of Pr substitution on superconducting and transport properties has been studied in the Bi-Pb-Sr-Ca-Cu-O system. We obtain samples with structure similar to the 80-K phase for Tc(R=0) up to 102 K. In particular, the highest Tc (102 K) is obtained with the nominal composition Bi1.7Pb0.3Sr1.8Pr0.2Ca2Cu3O10+y, showing an 80-K single phase. We believe that the variation of Tc is determined by changes in the hole density in the Cu-O2 planes due to the substitution of Pr into Sr sites.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi1.7Pb0.3Sr1.8Pr0.2Ca2Cu3O10+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 102 | Pressure not reported | zero_resistance |
| Bi1.7Pb0.3Sr1.82Pr0.18Ca2Cu3O10+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 75.8 | Pressure not reported | zero_resistance |
| Bi1.7Pb0.3Sr1.78Pr0.22Ca2Cu3O10+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 75.3 | Pressure not reported | zero_resistance |
| Bi1.7Pb0.3Sr1.7Pr0.3Ca2Cu3O10+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 71.6 | Pressure not reported | zero_resistance |
| Bi1.7Pb0.3Sr1.6Pr0.4Ca2Cu3O10+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 52 | Pressure not reported | zero_resistance |
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