Superconductivity in the Tl-Nd-Sr-Cu-O and the Tl-Pb-Nd-Sr-Cu-O systems

Takao Itoh; Hiroshi Uchikawa

doi:10.1103/PhysRevB.39.4690

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Superconductivity in the Tl-Nd-Sr-Cu-O and the Tl-Pb-Nd-Sr-Cu-O systems

Takao Itoh, Hiroshi Uchikawa

DOI 10.1103/PhysRevB.39.4690 · Physical Review B

T1

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Abstract

We report the evidence for superconductivity in the Tl-Nd-Sr-Cu-O and the Tl-Pb-Nd-Sr-Cu-O systems. The highest onset temperature is observed at 44 K in the Tl-Pb-Nd-Sr-Cu-O system. The superconductivity of the samples was confirmed by both the resistivity and ac susceptibility measurements. Introduction of PbO into the Tl-Nd-Sr-Cu-O system stabilizes the superconducting phase, as was observed in the Bi-Sr-Ca-Cu-O or the Tl-Sr-Ca-Cu-O system. The superconducting properties in the systems Tl-Pb-L-Sr-Cu-O, with L denoting lanthanide elements other than Nd are also discussed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
TlNdSr2Cu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	onset
Tl1.5Pb0.5NdSr2Cu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	44	Pressure not reported	onset
Tl1.5Pb0.5NdSr2Cu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	onset
TlyPbo.5Nd2Sr2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	onset
TlyPbo.5Nd2Sr2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	onset
TlyPbo.5NdSr2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	onset
TlyPbo.5NdSr2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	onset
TlyNdSr2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	onset
TlyNd2Sr2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	onset
TlyPb0.5Pr2Sr2Cu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	onset
TlyPb0.5Sm2Sr2Cu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	onset
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown