Vibrating-reed studies on non-single-phase Bi-Ca-Sr-Cu-O superconducting ceramics
A. Gupta, P. Esquinazi, H. F. Braun
DOI 10.1103/PhysRevB.39.12271 · Physical Review B
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Abstract
The resonance frequency ω and damping Γ of two selected reeds of Bi-Ca-Sr-Cu-O ceramics were measured between 4.2 and 100 K in different applied magnetic fields up to 0.3 T. The samples showed large anomalies in ω and Γ at ≃60 and ≃45 K indicating the existence of different superconducting phases. These anomalies can be interpreted in terms of pinning and hysteretic motion of flux lines. Within experimental resolution x-ray-powder patterns resemble that of the 85-K superconductor Bi2CaSr2Cu2O8.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2CaSr2Cu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | unknown |
| EuBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87 | Pressure not reported | onset |
| BiCaSrCu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure unresolved | onset |
| BiCaSrCu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure unresolved | onset |
| BiCa0.5Sr1.5Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure unresolved | onset |
| BiCa0.5Sr1.5Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure unresolved | onset |
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