Superconductivity in La-Ba-Cu-O metallic oxide compounds above 50 K

I. Kirschner; J. Bánkuti; M. Gál; K. Torkos

doi:10.1103/PhysRevB.36.2313

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Superconductivity in La-Ba-Cu-O metallic oxide compounds above 50 K

I. Kirschner, J. Bánkuti, M. Gál, K. Torkos

DOI 10.1103/PhysRevB.36.2313 · Physical Review B

T1

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Abstract

Metallic oxide compound systems of La-Ba-Cu-O have been prepared for investigation of conductivity phenomena. Physical and chemical properties of the samples have been determined by thermogravimetry, x-ray powder diffraction, and scanning electron microscopy. The highest onset temperatures reached for superconducting transition are 51 and 56 K with temperature widths of 2 and 3 K, respectively. Magnetic behavior corresponding to superconductivity has been observed too.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
(La1.6Ba0.4)CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	51.2	Pressure unresolved	onset
(La1.6Ba0.4)CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	49	Pressure unresolved	zero_resistance
(La1.6Ba0.4)CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	50.2	Pressure unresolved	midpoint
(La0.8Ba0.2)CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	56	Pressure unresolved	onset
(La0.8Ba0.2)CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	53	Pressure unresolved	zero_resistance
(La0.8Ba0.2)CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	54.5	Pressure unresolved	midpoint
La4.25Ba0.75Cu5O5(3-y) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	35	Pressure not reported	onset
La0.8Ba0.2CuO3-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40.2	Pressure not reported	onset
La1.8Sr0.2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	36.2	Pressure not reported	unknown
(Y0.6Ba0.4)CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	80	Pressure not reported	onset
La1.85Ba0.15CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown