Superconductivity and crystal structure in the La-Ba-Cu-O system
C. Dong, J. K. Liang, G. C. Che, S. S. Xie, Z. X. Zhao, Q. S. Yang, Y. M. Ni, G. R. Liu
DOI 10.1103/PhysRevB.37.5182 · Physical Review B
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Abstract
A series of samples with nominal compositions La1−xBaxCu1O3−y was prepared by solid-state reaction. The subsolidus phase relation in the CuO-rich region of the La-Ba-Cu-O system has been determined by an x-ray diffraction method. Two ternary compounds were confirmed to exist in the system. The tetragonal or pseudotetragonal phase (Ba2−zLaz)La1Cu3O7+δ has a wide homogenous phase range from z=0.095 to z=0.578, and a crystal structure closely related to the structure of Ba2YCu3O7−δ. Superconductivity of compounds in this system was studied by resistivity and ac susceptibility measurements. The relation between crystal structure and the superconductivity is discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La4Ba1Cu5O13.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La4Ba1Cu5O13.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2Ba3Cu5O5.5-p Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Y2Ba3Cu5O1-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89 | Pressure not reported | zero_resistance |
| Ba2YCu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
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