Superconductivity, intragrain penetration depth, and Meissner effect of RuSr2(Gd,Ce)2Cu2O10+δ
Y. Y. Xue, B. Lorenz, A. Baikalov, D. H. Cao, Z. G. Li, C. W. Chu
DOI 10.1103/PhysRevB.66.014503 · Physical Review B
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Abstract
The hole concentration p(δ), the transition temperature Tc, the intragrain penetration depth λ, and the Meissner effect were measured for annealed RuSr2(Gd,Ce)2Cu2O10+δ samples. The intragrain superconducting transition temperature Tc varied from 17 to 40 K while the p changed by only 0.03 holes/CuO2. The intragrain superfluid density 1/λ2 and the diamagnetic drop of the field-cooled magnetization across Tc (the Meissner effect), however, increased more than 10 times. All of these findings are in disagreement with both the Tc vs p and the Tc vs 1/λ2 correlations proposed for homogeneous cuprates, but are in line with a possible phase separation and the granularity associated with it.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| RuSr2(Gd,Ce)2Cu2O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 40 | Pressure not reported | onset |
| RuSr2(Gd,Ce)2Cu2O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 17 | Pressure not reported | onset |
| RuSr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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