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

Superconductivity, intragrain penetration depth, and Meissner effect of RuSr₂(Gd,Ce)₂Cu₂O_10+δ

Y. Y. Xue, B. Lorenz, A. Baikalov, D. H. Cao, Z. G. Li, C. W. Chu

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Abstract

The hole concentration p(δ), the transition temperature T_c, the intragrain penetration depth λ, and the Meissner effect were measured for annealed RuSr₂(Gd,Ce)₂Cu₂O_10+δ samples. The intragrain superconducting transition temperature T_c 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 T_c (the Meissner effect), however, increased more than 10 times. All of these findings are in disagreement with both the T_c vs p and the T_c vs 1/λ² correlations proposed for homogeneous cuprates, but are in line with a possible phase separation and the granularity associated with it.

Original language	English
Article number	014503
Pages (from-to)	145031-145035
Number of pages	5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	66
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.66.014503
Publication status	Published - 2002 Jul 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.66.014503

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title = "Superconductivity, intragrain penetration depth, and Meissner effect of RuSr2(Gd,Ce)2Cu2O10+δ",

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.",

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AU - Xue, Y. Y.

AU - Lorenz, B.

AU - Baikalov, A.

AU - Cao, D. H.

AU - Li, Z. G.

AU - Chu, C. W.

PY - 2002/7/1

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Superconductivity, intragrain penetration depth, and Meissner effect of RuSr₂(Gd,Ce)₂Cu₂O_10+δ

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