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Title: Strain tolerant microfilamentary conductors of Bi sub 2 Sr sub 2 Ca sub 1 Cu sub 2 O sub 8 minus. delta

Abstract

A highly strain tolerant family of conductors has been developed for the high-temperature superconductor Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8{minus}{delta}} by fabricating a microfilamentary composite in which discontinuous filaments of the superconductors are separated from one another by very thin layers of Ag. The Ag provides a region of plastic flow and the strain tolerance. The Ag also provides barriers to supercurrent flow and to overcome these barriers, long slender filaments of Bi(2212) are arranged to have enormous overlap areas perpendicular to the direction of average current flow. This requires filament length to diameter ratios of about 10 000 to 1 and Ag barrier thicknesses on the order of 20 nm. This permits high {ital J}{sub {ital c}} values even though the sample has a dense array of barriers. At 4.2 K and 0.3 T, critical current densities typically fall smoothly from 1000 to 800 A/cm{sup 2} as the strain increases from 0 to 1.6%.

Authors:
; ; ; ;  [1]; ; ;  [2]
  1. Ames Laboratory, USDOE and Department of Physics, Iowa State University, Ames, Iowa 50011 (US A)
  2. Babcock and Wilcox Research Center, Alliance, Ohio 44601 (USA)
Publication Date:
OSTI Identifier:
5563417
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters; (United States)
Additional Journal Information:
Journal Volume: 58:19; Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH OXIDES; CRITICAL CURRENT; RECRYSTALLIZATION; CALCIUM OXIDES; COPPER OXIDES; STRONTIUM OXIDES; AMES LABORATORY; FABRICATION; FILAMENTS; STRAINS; SUPERCONDUCTIVITY; ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; NATIONAL ORGANIZATIONS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; STRONTIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; US AEC; US DOE; US ERDA; US ORGANIZATIONS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360204 - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats

Miller, T A, Ostenson, J E, Li, Q, Schwartzkopf, L A, Finnemore, D K, Righi, J, Gleixner, R A, and Zeigler, D. Strain tolerant microfilamentary conductors of Bi sub 2 Sr sub 2 Ca sub 1 Cu sub 2 O sub 8 minus. delta. United States: N. p., 1991. Web. doi:10.1063/1.104992.
Miller, T A, Ostenson, J E, Li, Q, Schwartzkopf, L A, Finnemore, D K, Righi, J, Gleixner, R A, & Zeigler, D. Strain tolerant microfilamentary conductors of Bi sub 2 Sr sub 2 Ca sub 1 Cu sub 2 O sub 8 minus. delta. United States. doi:10.1063/1.104992.
Miller, T A, Ostenson, J E, Li, Q, Schwartzkopf, L A, Finnemore, D K, Righi, J, Gleixner, R A, and Zeigler, D. Mon . "Strain tolerant microfilamentary conductors of Bi sub 2 Sr sub 2 Ca sub 1 Cu sub 2 O sub 8 minus. delta". United States. doi:10.1063/1.104992.
@article{osti_5563417,
title = {Strain tolerant microfilamentary conductors of Bi sub 2 Sr sub 2 Ca sub 1 Cu sub 2 O sub 8 minus. delta},
author = {Miller, T A and Ostenson, J E and Li, Q and Schwartzkopf, L A and Finnemore, D K and Righi, J and Gleixner, R A and Zeigler, D},
abstractNote = {A highly strain tolerant family of conductors has been developed for the high-temperature superconductor Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8{minus}{delta}} by fabricating a microfilamentary composite in which discontinuous filaments of the superconductors are separated from one another by very thin layers of Ag. The Ag provides a region of plastic flow and the strain tolerance. The Ag also provides barriers to supercurrent flow and to overcome these barriers, long slender filaments of Bi(2212) are arranged to have enormous overlap areas perpendicular to the direction of average current flow. This requires filament length to diameter ratios of about 10 000 to 1 and Ag barrier thicknesses on the order of 20 nm. This permits high {ital J}{sub {ital c}} values even though the sample has a dense array of barriers. At 4.2 K and 0.3 T, critical current densities typically fall smoothly from 1000 to 800 A/cm{sup 2} as the strain increases from 0 to 1.6%.},
doi = {10.1063/1.104992},
journal = {Applied Physics Letters; (United States)},
issn = {0003-6951},
number = ,
volume = 58:19,
place = {United States},
year = {1991},
month = {5}
}