Crypto-superconductivity in RuSr2GdCu2O8

Y. Y. Xue; S. Tsui; J. Cmaidalka; R. L. Meng; B. Lorenz; C. W. Chu

doi:10.1016/S0921-4534(00)00661-4

Crypto-superconductivity in RuSr₂GdCu₂O₈

Y. Y. Xue, S. Tsui, J. Cmaidalka, R. L. Meng, B. Lorenz, C. W. Chu

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Abstract

The susceptibility x = x′ + ix″ of RuSr₂GdCu₂O₈ powders at 2 K has been deduced from ac and dc magnetizations with their particle size d from 800 to 10 μm and grain size 1-5 μm. It is observed that the loss part, x″, scales with d over a field range of 0.0001 to 100 Oe, suggesting that the supercurrent is homogeneously distributed over particles as small as 10 μm. However, the inductance part, x′, decreases with d systematically and drastically. An effective penetration depth as large as 30-50 μm is needed, which suggests a very small super-carrier concentration. Crypto-superconductivity is proposed to accommodate the data.

Original language	English
Pages (from-to)	483-484
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	341-348
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(00)00661-4
Publication status	Published - 2000

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/S0921-4534(00)00661-4

Cite this

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title = "Crypto-superconductivity in RuSr2GdCu2O8",

abstract = "The susceptibility x = x′ + ix″ of RuSr2GdCu2O8 powders at 2 K has been deduced from ac and dc magnetizations with their particle size d from 800 to 10 μm and grain size 1-5 μm. It is observed that the loss part, x″, scales with d over a field range of 0.0001 to 100 Oe, suggesting that the supercurrent is homogeneously distributed over particles as small as 10 μm. However, the inductance part, x′, decreases with d systematically and drastically. An effective penetration depth as large as 30-50 μm is needed, which suggests a very small super-carrier concentration. Crypto-superconductivity is proposed to accommodate the data.",

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T1 - Crypto-superconductivity in RuSr2GdCu2O8

AU - Xue, Y. Y.

AU - Tsui, S.

AU - Cmaidalka, J.

AU - Meng, R. L.

AU - Lorenz, B.

AU - Chu, C. W.

PY - 2000

Y1 - 2000

N2 - The susceptibility x = x′ + ix″ of RuSr2GdCu2O8 powders at 2 K has been deduced from ac and dc magnetizations with their particle size d from 800 to 10 μm and grain size 1-5 μm. It is observed that the loss part, x″, scales with d over a field range of 0.0001 to 100 Oe, suggesting that the supercurrent is homogeneously distributed over particles as small as 10 μm. However, the inductance part, x′, decreases with d systematically and drastically. An effective penetration depth as large as 30-50 μm is needed, which suggests a very small super-carrier concentration. Crypto-superconductivity is proposed to accommodate the data.

AB - The susceptibility x = x′ + ix″ of RuSr2GdCu2O8 powders at 2 K has been deduced from ac and dc magnetizations with their particle size d from 800 to 10 μm and grain size 1-5 μm. It is observed that the loss part, x″, scales with d over a field range of 0.0001 to 100 Oe, suggesting that the supercurrent is homogeneously distributed over particles as small as 10 μm. However, the inductance part, x′, decreases with d systematically and drastically. An effective penetration depth as large as 30-50 μm is needed, which suggests a very small super-carrier concentration. Crypto-superconductivity is proposed to accommodate the data.

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Crypto-superconductivity in RuSr₂GdCu₂O₈

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