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Title: Excellent thermal stability of superconducting properties in YBa sub 2 Cu sub 3 O sub 7 films irradiated by pulsed excimer lasers

Abstract

We have investigated the microstructure and superconducting properties of YBa{sub 2}Cu{sub 3}O{sub 7} films irradiated by nanosecond pulsed excimer lasers. The superconducting YBa{sub 2}Cu{sub 3}O{sub 7} thin films were deposited {ital in} {ital situ} on (100) LaAlO{sub 3} substrates using the pulsed laser evaporation technique. The virgin unirradiated YBa{sub 2}Cu{sub 3}O{sub 7} films exhibited excellent superconducting properties with {ital T}{sub co} (temperature for zero resistance) of 90 K and critical current densities {ital J}{sub {ital c}} (at 77 K and zero magnetic fields) of approximately 5.0 {times} 10{sup 6} A/cm{sup 2}. The films were further irradiated by a pulsed excimer XeCl laser ({lambda}=308 nm, {tau}=45{times}10{sup {minus}9} s) with energy density varying from 30 to 300 mJ/cm{sup 2}. Excellent thermal stability was observed for YBa{sub 2}Cu{sub 3}O{sub 7} films on LaAlO{sub 3} substrate for laser irradiation at all energy densities between 30 and 300 mJ/cm{sup 2}, with no deterioration in the {ital T}{sub co} values (90{plus minus}0.3 K). An improvement in the {ital J}{sub {ital c}} of the films was observed at low-energy density irradiation, however, for energy densities above the melt threshold the {ital J}{sub {ital c}} values decreased sharply. The Raman measurements for laser irradiated films showed improvement inmore » the crystallinity of the film with stronger Raman peaks at 140 and 340 cm{sup {minus}1}, thus correlating the improvement in {ital J}{sub {ital c}} to better crystallinity of the films.« less

Authors:
; ;  [1]; ;  [2]; ; ;  [3]
  1. Department of Materials Science and Engineering, University of Florida, Gainesville, Florida (USA)
  2. Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina (USA)
  3. Department of Physics, North Carolina State University, Raleigh, North Carolina (USA)
Publication Date:
OSTI Identifier:
5341581
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters; (United States)
Additional Journal Information:
Journal Volume: 59:11; Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM OXIDES; PHYSICAL RADIATION EFFECTS; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; YTTRIUM OXIDES; ALUMINATES; CRITICAL CURRENT; EXCIMER LASERS; IN-SITU PROCESSING; LANTHANUM COMPOUNDS; MICROSTRUCTURE; NEAR ULTRAVIOLET RADIATION; PULSES; SUPERCONDUCTING FILMS; SUPERCONDUCTIVITY; ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL STRUCTURE; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; ELECTROMAGNETIC RADIATION; FILMS; GAS LASERS; LASERS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PROCESSING; RADIATION EFFECTS; RADIATIONS; RARE EARTH COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; ULTRAVIOLET RADIATION; YTTRIUM COMPOUNDS; 360204* - Ceramics, Cermets, & Refractories- Physical Properties; 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies

Citation Formats

Singh, R K, Bhattacharya, D, Harkness, S, Narayan, J, Diwari, P, Jahncke, C, Sparks, R, and Paesler, M. Excellent thermal stability of superconducting properties in YBa sub 2 Cu sub 3 O sub 7 films irradiated by pulsed excimer lasers. United States: N. p., 1991. Web. doi:10.1063/1.105315.
Singh, R K, Bhattacharya, D, Harkness, S, Narayan, J, Diwari, P, Jahncke, C, Sparks, R, & Paesler, M. Excellent thermal stability of superconducting properties in YBa sub 2 Cu sub 3 O sub 7 films irradiated by pulsed excimer lasers. United States. https://doi.org/10.1063/1.105315
Singh, R K, Bhattacharya, D, Harkness, S, Narayan, J, Diwari, P, Jahncke, C, Sparks, R, and Paesler, M. 1991. "Excellent thermal stability of superconducting properties in YBa sub 2 Cu sub 3 O sub 7 films irradiated by pulsed excimer lasers". United States. https://doi.org/10.1063/1.105315.
@article{osti_5341581,
title = {Excellent thermal stability of superconducting properties in YBa sub 2 Cu sub 3 O sub 7 films irradiated by pulsed excimer lasers},
author = {Singh, R K and Bhattacharya, D and Harkness, S and Narayan, J and Diwari, P and Jahncke, C and Sparks, R and Paesler, M},
abstractNote = {We have investigated the microstructure and superconducting properties of YBa{sub 2}Cu{sub 3}O{sub 7} films irradiated by nanosecond pulsed excimer lasers. The superconducting YBa{sub 2}Cu{sub 3}O{sub 7} thin films were deposited {ital in} {ital situ} on (100) LaAlO{sub 3} substrates using the pulsed laser evaporation technique. The virgin unirradiated YBa{sub 2}Cu{sub 3}O{sub 7} films exhibited excellent superconducting properties with {ital T}{sub co} (temperature for zero resistance) of 90 K and critical current densities {ital J}{sub {ital c}} (at 77 K and zero magnetic fields) of approximately 5.0 {times} 10{sup 6} A/cm{sup 2}. The films were further irradiated by a pulsed excimer XeCl laser ({lambda}=308 nm, {tau}=45{times}10{sup {minus}9} s) with energy density varying from 30 to 300 mJ/cm{sup 2}. Excellent thermal stability was observed for YBa{sub 2}Cu{sub 3}O{sub 7} films on LaAlO{sub 3} substrate for laser irradiation at all energy densities between 30 and 300 mJ/cm{sup 2}, with no deterioration in the {ital T}{sub co} values (90{plus minus}0.3 K). An improvement in the {ital J}{sub {ital c}} of the films was observed at low-energy density irradiation, however, for energy densities above the melt threshold the {ital J}{sub {ital c}} values decreased sharply. The Raman measurements for laser irradiated films showed improvement in the crystallinity of the film with stronger Raman peaks at 140 and 340 cm{sup {minus}1}, thus correlating the improvement in {ital J}{sub {ital c}} to better crystallinity of the films.},
doi = {10.1063/1.105315},
url = {https://www.osti.gov/biblio/5341581}, journal = {Applied Physics Letters; (United States)},
issn = {0003-6951},
number = ,
volume = 59:11,
place = {United States},
year = {1991},
month = {9}
}