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Title: Enhanced J{sub c} and improved grain-boundary properties in Ag-doped YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films

Abstract

A large increase ({approximately}8{times}) in critical current density, J{sub c}, was achieved for {ital in situ} laser ablated YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}{endash}Ag films. High-resolution Auger electron spectroscopic investigation indicates that the Ag-doped films are stoichiometric with a relatively low grain-boundary extension (8 nm) in contrast to undoped YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films (32 nm). Further analysis suggests that the doped film contains a much lower silver content ({lt}0.15wt{percent}) than in the target material (5 wt{percent}). These observations are in excellent agreement with the temperature dependence of J{sub c}, the room-temperature resistivity, and the surface resistance results. Thus, J{sub c} enhancement in Ag-doped films can be attributed to their superior properties, viz., improved microstructure characteristics and the reduced resistive grain boundaries. {copyright} {ital 1997 American Institute of Physics.}

Authors:
 [1];  [2]; ; ;  [3]
  1. Department of Chemistry, Indian Institute of Technology, Powai, Bombay 400 076 (India)
  2. Institut fuer Technische Physik, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe (Germany)
  3. Tata Institute of Fundamental Research, Colaba, Bombay 400 005 (India)
Publication Date:
OSTI Identifier:
531713
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 71; Journal Issue: 1; Other Information: PBD: Jul 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SUPERCONDUCTING FILMS; CRYSTAL DOPING; YTTRIUM COMPOUNDS; BARIUM COMPOUNDS; SILVER; GRAIN BOUNDARIES; AUGER EFFECT; STOICHIOMETRY; ELECTRIC CONDUCTIVITY; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; SILVER ADDITIONS; CRITICAL CURRENT; HIGH-TC SUPERCONDUCTORS; TEMPERATURE DEPENDENCE; MICROSTRUCTURE

Citation Formats

Selvam, P, Seibt, E W, Kumar, D, Pinto, R, and Apte, P R. Enhanced J{sub c} and improved grain-boundary properties in Ag-doped YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films. United States: N. p., 1997. Web. doi:10.1063/1.119452.
Selvam, P, Seibt, E W, Kumar, D, Pinto, R, & Apte, P R. Enhanced J{sub c} and improved grain-boundary properties in Ag-doped YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films. United States. https://doi.org/10.1063/1.119452
Selvam, P, Seibt, E W, Kumar, D, Pinto, R, and Apte, P R. Tue . "Enhanced J{sub c} and improved grain-boundary properties in Ag-doped YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films". United States. https://doi.org/10.1063/1.119452.
@article{osti_531713,
title = {Enhanced J{sub c} and improved grain-boundary properties in Ag-doped YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films},
author = {Selvam, P and Seibt, E W and Kumar, D and Pinto, R and Apte, P R},
abstractNote = {A large increase ({approximately}8{times}) in critical current density, J{sub c}, was achieved for {ital in situ} laser ablated YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}{endash}Ag films. High-resolution Auger electron spectroscopic investigation indicates that the Ag-doped films are stoichiometric with a relatively low grain-boundary extension (8 nm) in contrast to undoped YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films (32 nm). Further analysis suggests that the doped film contains a much lower silver content ({lt}0.15wt{percent}) than in the target material (5 wt{percent}). These observations are in excellent agreement with the temperature dependence of J{sub c}, the room-temperature resistivity, and the surface resistance results. Thus, J{sub c} enhancement in Ag-doped films can be attributed to their superior properties, viz., improved microstructure characteristics and the reduced resistive grain boundaries. {copyright} {ital 1997 American Institute of Physics.}},
doi = {10.1063/1.119452},
url = {https://www.osti.gov/biblio/531713}, journal = {Applied Physics Letters},
number = 1,
volume = 71,
place = {United States},
year = {1997},
month = {7}
}