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Title: Laser deposition and laser modification of high-temperature superconducting thin films

Abstract

Applications of high-temperature superconductors (HTSC) may require epitaxial films with {Tc}{ge}77 K, and J{sub c}{ge}10{sup 6} A/cm{sup 2}. In situ pulsed laser deposition (PLD) is suitable for fabrication of such films. We report parametric studies on the effect of laser and processing parameters on the crystallinity, epitaxy and electrical properties of laser-deposited HTSC thin films. In addition, several laser-based processes were used to modify the electrical properties ({Tc} and J{sub c}) of PLD thin films. A direct-write laser heating (1.06 {mu}m at {approx}0.5 kW/cm{sup 2} for {approx}5 min) process in an oxygen atmosphere at {approx}590 Torr was shown to selectivity regenerate high-{Tc} material in microscopic domains from films that were partially deoxygenated. In separate work, electrical responses and crystallinity of HTSC films were measured as a function of excimer laser exposure using fluences in the range 20--150 mJ/cm{sup 2}. The critical current and boundary layer could be modified with a high degree of accuracy. 17 refs., 4 figs.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
5097649
Report Number(s):
LA-UR-91-3463; CONF-911047-8
ON: DE92002518
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: 180. meeting of the Electrochemical Society, Phoenix, AZ (United States), 13-18 Oct 1991
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SUPERCONDUCTING FILMS; DEPOSITION; RADIATION EFFECTS; BARIUM OXIDES; COPPER OXIDES; CRITICAL CURRENT; HIGH-TC SUPERCONDUCTORS; LASER RADIATION; YTTRIUM OXIDES; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CURRENTS; ELECTRIC CURRENTS; ELECTROMAGNETIC RADIATION; FILMS; OXIDES; OXYGEN COMPOUNDS; RADIATIONS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360206 - Ceramics, Cermets, & Refractories- Radiation Effects

Citation Formats

Dye, R C, Foltyn, S R, Nogar, N S, Wu, X D, Peterson, E J, and Muenchausen, R E. Laser deposition and laser modification of high-temperature superconducting thin films. United States: N. p., 1991. Web.
Dye, R C, Foltyn, S R, Nogar, N S, Wu, X D, Peterson, E J, & Muenchausen, R E. Laser deposition and laser modification of high-temperature superconducting thin films. United States.
Dye, R C, Foltyn, S R, Nogar, N S, Wu, X D, Peterson, E J, and Muenchausen, R E. 1991. "Laser deposition and laser modification of high-temperature superconducting thin films". United States. https://www.osti.gov/servlets/purl/5097649.
@article{osti_5097649,
title = {Laser deposition and laser modification of high-temperature superconducting thin films},
author = {Dye, R C and Foltyn, S R and Nogar, N S and Wu, X D and Peterson, E J and Muenchausen, R E},
abstractNote = {Applications of high-temperature superconductors (HTSC) may require epitaxial films with {Tc}{ge}77 K, and J{sub c}{ge}10{sup 6} A/cm{sup 2}. In situ pulsed laser deposition (PLD) is suitable for fabrication of such films. We report parametric studies on the effect of laser and processing parameters on the crystallinity, epitaxy and electrical properties of laser-deposited HTSC thin films. In addition, several laser-based processes were used to modify the electrical properties ({Tc} and J{sub c}) of PLD thin films. A direct-write laser heating (1.06 {mu}m at {approx}0.5 kW/cm{sup 2} for {approx}5 min) process in an oxygen atmosphere at {approx}590 Torr was shown to selectivity regenerate high-{Tc} material in microscopic domains from films that were partially deoxygenated. In separate work, electrical responses and crystallinity of HTSC films were measured as a function of excimer laser exposure using fluences in the range 20--150 mJ/cm{sup 2}. The critical current and boundary layer could be modified with a high degree of accuracy. 17 refs., 4 figs.},
doi = {},
url = {https://www.osti.gov/biblio/5097649}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

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