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

doi:https://doi.org/10.1063/1.119452

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

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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:

Selvam, P ^[1]; Seibt, E W ^[2]; Kumar, D; Pinto, R; Apte, P R ^[3]

Department of Chemistry, Indian Institute of Technology, Powai, Bombay 400 076 (India)
Institut fuer Technische Physik, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe (Germany)
Tata Institute of Fundamental Research, Colaba, Bombay 400 005 (India)

Publication Date:: 1997-07-01

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.

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                    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

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                    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.

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@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}

}

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