Superconducting properties of the Ba1−xRbxBiO3 system
Izumi Tomeno, Ken Ando
DOI 10.1103/PhysRevB.40.2690 · Physical Review B
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Abstract
Magnetization measurements revealed that Ba1−xRbxBiO3 exhibits superconductivity at TC=29 K in the 0.28≤x≤0.44 range. In this range the room-temperature crystal structure belongs to the cubic phase. The TC value is independent of Rb concentration, although the lattice parameter decreases linearly with increasing x. Material parameters for Ba0.6Rb0.4BiO3 are derived from measurements on the lower and upper critical fields. Comparison with Ba0.6K0.4BiO3 shows that physical properties of the two superconductors are practically described by the same material parameters. The Sommerfeld parameter γ is found to be 2.4 mJ mole−1 K−2, which is in good agreement with the value estimated from the normal-state susceptibility.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba1-xRbxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29 | Pressure not reported | onset |
| Ba0.6Rb0.4BiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29 | Pressure not reported | onset |
| Ba1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| Ba0.6K0.4BiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30.5 | Pressure not reported | unknown |
| BaPb0.75Bi0.25O3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
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