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Title: High Performance High-T c Superconducting Wires

Abstract

We demonstrated short segments of a superconducting wire that meets or exceeds performance requirements for many large-scale applications of high-temperature superconducting materials, especially those requiring a high supercurrent and/or a high engineering critical current density in applied magnetic fields. The performance requirements for these varied applications were met in 3-micrometer-thick YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} films epitaxially grown via pulsed laser ablation on rolling assisted biaxially textured substrates. Enhancements of the critical current in self-field as well as excellent retention of this current in high applied magnetic fields were achieved in the thick films via incorporation of a periodic array of extended columnar defects, composed of self-aligned nanodots of nonsuperconducting material extending through the entire thickness of the film. These columnar defects are highly effective in pinning the superconducting vortices or flux lines, thereby resulting in the substantially enhanced performance of this wire.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
OE USDOE - Office of Electric Transmission and Distribution
OSTI Identifier:
1003494
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Science; Journal Volume: 311; Journal Issue: 5769
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HIGH-TC SUPERCONDUCTORS; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; CRITICAL CURRENT; CURRENT DENSITY; DEFECTS; PERFORMANCE; SUPERCONDUCTING WIRES; MAGNETIC FLUX

Citation Formats

Kang, Sukill, Goyal, Amit, Li, Jing, Gapud, Albert Agcaoili, Martin, Patrick M, Heatherly Jr, Lee, Thompson, James R, Christen, David K, List III, Frederick Alyious, Paranthaman, Mariappan Parans, and Lee, Dominic F. High Performance High-Tc Superconducting Wires. United States: N. p., 2006. Web. doi:10.1126/science.1124872.
Kang, Sukill, Goyal, Amit, Li, Jing, Gapud, Albert Agcaoili, Martin, Patrick M, Heatherly Jr, Lee, Thompson, James R, Christen, David K, List III, Frederick Alyious, Paranthaman, Mariappan Parans, & Lee, Dominic F. High Performance High-Tc Superconducting Wires. United States. doi:10.1126/science.1124872.
Kang, Sukill, Goyal, Amit, Li, Jing, Gapud, Albert Agcaoili, Martin, Patrick M, Heatherly Jr, Lee, Thompson, James R, Christen, David K, List III, Frederick Alyious, Paranthaman, Mariappan Parans, and Lee, Dominic F. Sun . "High Performance High-Tc Superconducting Wires". United States. doi:10.1126/science.1124872.
@article{osti_1003494,
title = {High Performance High-Tc Superconducting Wires},
author = {Kang, Sukill and Goyal, Amit and Li, Jing and Gapud, Albert Agcaoili and Martin, Patrick M and Heatherly Jr, Lee and Thompson, James R and Christen, David K and List III, Frederick Alyious and Paranthaman, Mariappan Parans and Lee, Dominic F},
abstractNote = {We demonstrated short segments of a superconducting wire that meets or exceeds performance requirements for many large-scale applications of high-temperature superconducting materials, especially those requiring a high supercurrent and/or a high engineering critical current density in applied magnetic fields. The performance requirements for these varied applications were met in 3-micrometer-thick YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} films epitaxially grown via pulsed laser ablation on rolling assisted biaxially textured substrates. Enhancements of the critical current in self-field as well as excellent retention of this current in high applied magnetic fields were achieved in the thick films via incorporation of a periodic array of extended columnar defects, composed of self-aligned nanodots of nonsuperconducting material extending through the entire thickness of the film. These columnar defects are highly effective in pinning the superconducting vortices or flux lines, thereby resulting in the substantially enhanced performance of this wire.},
doi = {10.1126/science.1124872},
journal = {Science},
number = 5769,
volume = 311,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}
  • The discovery of high-temperature superconductivity in perovskite-related oxides has generated an enormous amount of research activity and development effort toward applications. Commercially useful bulk superconductors typically require stabilization using a normal metal cladding for reasons of electrical, thermal, and mechanical protection, and in general need to be fabricated into fine fibers and wound into a solenoid configuration. The YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ type compound is a ceramic material which is mechanically hard and brittle, and is difficult to fabricate into fine wires. However, this difficulty has been overcome by several fabrication methods such as powder-in-tube method (metal-clad composite), powder-coatingmore » method (metal-core composite), and molten oxide processing method. The effect of various processing steps on the structure and superconducting properties such as transition temperature and critical current density will be discussed. Some experiments to raise the high field critical current through chemistry and microstructural control will also be described.« less
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  • We report the successful fabrication and characterization of a high T/sub c/ superconducting microwave cavity. The cavity made of bulk Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub y/ (T/sub c/ = 93 K) and dielectrically loaded with sapphire was resonant at 8.00 GHz in the TE/sub 011/ mode. At 77 K the Q was 10/sup 4/, which represents an improvement of a factor of 11 from the normal state. At 4.2 K the Q was nearly 10/sup 5/. The temperature dependence of the Q correlates extremely well with the microwave surface resistance of a test sample measured independently, clearly showing that the Qmore » was limited by the intrinsic materials preparation and not by extraneous factors.« less
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