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Title: Surface morphology and critical current density of high quality YBa{sub 2}Cu{sub 3}O{sub 7}

Abstract

Pulsed laser deposition has been used to prepare YBa{sub 2}Cu{sub 3}O{sub 7} (YBCO) film on CeO{sub 2} buffer layers on single crystal Al{sub 2}O{sub 3} (1{bar 1}02) substrates. High quality YBCO films have been obtained when 500-{angstrom}-thick CeO{sub 2} buffer layers were deposited with fluence of 1.5 J/cm{sup 2} and oxygen pressure of 50 mTorr. Surface morphology of the c-axis oriented YBCO films were strongly dependent on the preparation conditions of CeO{sub 2} buffer layers, resulting in significant changes of critical current densities. Critical current densities of YBCO films increased with the increase of the substrate temperature for ceO{sub 2} buffer layer deposition in the range 400 C {le} T{sub s} {le} 800 C. Superconducting properties in YBCO/CeO{sub 2}/Al{sub 2}O{sub 3} exhibit {Tc} = 89.5 K, {Delta}{Tc} {le} 0.5 K, and J{sub c} > 3 x 10{sup 6} A/cm{sup 2} at 77 K.

Authors:
; ; ;
Publication Date:
Research Org.:
Korea Research Inst. of Standards and Science, Taejon (KR)
OSTI Identifier:
20000843
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)
Additional Journal Information:
Journal Volume: 35; Journal Issue: 5Pt2; Conference: 1999 international magnetics conference (Intermag '99), Kyongju (KR), 05/18/1999--05/21/1999; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; CERIUM OXIDES; ALUMINIUM OXIDES; SUBSTRATES; MORPHOLOGY; CRITICAL CURRENT; CURRENT DENSITY; SUPERCONDUCTIVITY

Citation Formats

Kim, I.S., Lim, H.R., Kim, D.H., and Park, Y.K. Surface morphology and critical current density of high quality YBa{sub 2}Cu{sub 3}O{sub 7}. United States: N. p., 1999. Web.
Kim, I.S., Lim, H.R., Kim, D.H., & Park, Y.K. Surface morphology and critical current density of high quality YBa{sub 2}Cu{sub 3}O{sub 7}. United States.
Kim, I.S., Lim, H.R., Kim, D.H., and Park, Y.K. Wed . "Surface morphology and critical current density of high quality YBa{sub 2}Cu{sub 3}O{sub 7}". United States.
@article{osti_20000843,
title = {Surface morphology and critical current density of high quality YBa{sub 2}Cu{sub 3}O{sub 7}},
author = {Kim, I.S. and Lim, H.R. and Kim, D.H. and Park, Y.K.},
abstractNote = {Pulsed laser deposition has been used to prepare YBa{sub 2}Cu{sub 3}O{sub 7} (YBCO) film on CeO{sub 2} buffer layers on single crystal Al{sub 2}O{sub 3} (1{bar 1}02) substrates. High quality YBCO films have been obtained when 500-{angstrom}-thick CeO{sub 2} buffer layers were deposited with fluence of 1.5 J/cm{sup 2} and oxygen pressure of 50 mTorr. Surface morphology of the c-axis oriented YBCO films were strongly dependent on the preparation conditions of CeO{sub 2} buffer layers, resulting in significant changes of critical current densities. Critical current densities of YBCO films increased with the increase of the substrate temperature for ceO{sub 2} buffer layer deposition in the range 400 C {le} T{sub s} {le} 800 C. Superconducting properties in YBCO/CeO{sub 2}/Al{sub 2}O{sub 3} exhibit {Tc} = 89.5 K, {Delta}{Tc} {le} 0.5 K, and J{sub c} > 3 x 10{sup 6} A/cm{sup 2} at 77 K.},
doi = {},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)},
issn = {0018-9464},
number = 5Pt2,
volume = 35,
place = {United States},
year = {1999},
month = {9}
}