Superconducting properties of single-crystal Bi2Sr2CaCu2O8+y
J. J. Lin, E. L. Benitez, S. J. Poon, M. A. Subramanian, J. Gopalakrishnan, A. W. Sleight
DOI 10.1103/PhysRevB.38.5095 · Physical Review B
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Abstract
We have measured the Meissner (flux expulsion) effects, lower critical fields, Hc1, and magnetization curves in single-crystal Bi2Sr2CaCu2O8+y (idealized composition) in magnetic fields both parallel and perpendicular to the basal planes. We find that the Meissner flux expulsion fractions of these crystals are very large, reaching 57–74% (depending on field orientation) of that of an ideal superconductor. The lower critical fields are very small (≤100 G in the favorable orientation) and show a large anisotropy of 25. The magnetization critical current has also been determined to be ∼6×104 A/cm2 at 7 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 95 | Pressure not reported | onset |
| Bi2Sr3-xCaxCu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 95 | Pressure not reported | onset |
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