The giant short-time decay of persistent currents in Y1Ba2Cu3O7-δ at 77K

L. Gao; Y. Y. Xue; P. H. Hor; C. W. Chu

doi:10.1016/0921-4534(91)90501-O

The giant short-time decay of persistent currents in Y₁Ba₂Cu₃O_7-δ at 77K

L. Gao, Y. Y. Xue, P. H. Hor, C. W. Chu

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Abstract

Using a home-made pulse magnetometer, the decay of the persistent supercurrent in Y₁Ba₂Cu₃O_7-δ (Y1:2:3) has been measured from 10^-4 to 10⁵ s. There is a three-fold nonlogarithmic decrease in the persistent current from 10^-4 to 10 s at 77 K, suggesting that the traditionally measured critical current density (J_c) is only a small remnant of the fast reduced supercurrent. The nonlogarithmic decay suggests a significant negative curvature in the corresponding In V-ln I plot and fits with the collective pinning/superconductive glass model qualitatively.

Original language	English
Pages (from-to)	438-444
Number of pages	7
Journal	Physica C: Superconductivity and its applications
Volume	177
Issue number	4-6
DOIs	https://doi.org/10.1016/0921-4534(91)90501-O
Publication status	Published - 1991 Jul 1

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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10.1016/0921-4534(91)90501-O

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abstract = "Using a home-made pulse magnetometer, the decay of the persistent supercurrent in Y1Ba2Cu3O7-δ (Y1:2:3) has been measured from 10-4 to 105 s. There is a three-fold nonlogarithmic decrease in the persistent current from 10-4 to 10 s at 77 K, suggesting that the traditionally measured critical current density (Jc) is only a small remnant of the fast reduced supercurrent. The nonlogarithmic decay suggests a significant negative curvature in the corresponding In V-ln I plot and fits with the collective pinning/superconductive glass model qualitatively.",

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AU - Xue, Y. Y.

AU - Hor, P. H.

AU - Chu, C. W.

PY - 1991/7/1

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N2 - Using a home-made pulse magnetometer, the decay of the persistent supercurrent in Y1Ba2Cu3O7-δ (Y1:2:3) has been measured from 10-4 to 105 s. There is a three-fold nonlogarithmic decrease in the persistent current from 10-4 to 10 s at 77 K, suggesting that the traditionally measured critical current density (Jc) is only a small remnant of the fast reduced supercurrent. The nonlogarithmic decay suggests a significant negative curvature in the corresponding In V-ln I plot and fits with the collective pinning/superconductive glass model qualitatively.

AB - Using a home-made pulse magnetometer, the decay of the persistent supercurrent in Y1Ba2Cu3O7-δ (Y1:2:3) has been measured from 10-4 to 105 s. There is a three-fold nonlogarithmic decrease in the persistent current from 10-4 to 10 s at 77 K, suggesting that the traditionally measured critical current density (Jc) is only a small remnant of the fast reduced supercurrent. The nonlogarithmic decay suggests a significant negative curvature in the corresponding In V-ln I plot and fits with the collective pinning/superconductive glass model qualitatively.

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The giant short-time decay of persistent currents in Y₁Ba₂Cu₃O_7-δ at 77K

Abstract

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