Microstructure and properties of the ∼90-K superconductor Bi2Sr3−xCaxCu2O8+δ

Z. Iqbal; H. Eckhardt; F. Reidinger; A. Bose; J. C. Barry; B. L. Ramakrishna

doi:10.1103/PhysRevB.38.859

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Microstructure and properties of the ∼90-K superconductor Bi2Sr3−xCaxCu2O8+δ

Z. Iqbal, H. Eckhardt, F. Reidinger, A. Bose, J. C. Barry, B. L. Ramakrishna

DOI 10.1103/PhysRevB.38.859 · Physical Review B

T1

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Abstract

Phases with superconducting onset temperatures of 60, 87, and 112 K have been identified in the new superconductor Bi2Sr3−xCaxCu2O8+δ. The microstructures of two crystal types, one associated with the 87- and 60-K phases, and the other probably with the 112-K phase, have been examined by electron microscopy. The first crystal type has a superlattice structure which is incommensurate for the lower-temperature preparations. The second type of crystal, which forms at higher temperatures, has no superlattice structure.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr3-xCaxCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	60	Pressure not reported	onset
Bi2Sr3-xCaxCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	87	Pressure not reported	onset
Bi2Sr3-xCaxCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	112	Pressure not reported	onset
Bi2Sr3-xCaxCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	60	Pressure not reported	onset
Bi2Sr3-xCaxCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	87	Pressure not reported	onset
Bi2Sr3-xCaxCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	112	Pressure not reported	onset
Bi2Sr1Ca1Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	112	Pressure not reported	onset
Bi2Sr1Ca1Cu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	87	Pressure not reported	onset
Bi2Sr1.5Ca0.5Cu1.8Al0.2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	87	Pressure not reported	onset
Bi2Sr1.5Ca0.5Cu1.8Al0.2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	60	Pressure not reported	onset
La2-xBaxCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	30	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown