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Raman scattering spectroscopy of Nd1+xBa2-xCu 3O7 coated conductors grown by pulsed laser deposition

Title
Raman scattering spectroscopy of Nd1+xBa2-xCu 3O7 coated conductors grown by pulsed laser deposition
Authors
Um Y.M.Jo W.Seo C.W.Cheong H.Wee S.H.Yoo S.I.
Ewha Authors
조윌렴
SCOPUS Author ID
조윌렴scopus
Issue Date
2007
Journal Title
Superconductor Science and Technology
ISSN
0953-2048JCR Link
Citation
vol. 20, no. 10, pp. 925 - 929
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We analyzed Nd1+xBa2-xCu3O7 (NdBCO) coated conductors grown at various substrate temperatures by using Raman spectroscopy. Epitaxial NdBCO films were deposited on ion beam assisted deposition yttrium stabilized zirconia (IBAD-YSZ) templates by pulsed laser deposition. Raman scattering spectroscopy shows that the NdBCO film grown at a relatively low substrate temperature of 750 °C contains some a-axis oriented grains as well as c-axis oriented grains and an excess cation disorder between Nd3+ ions and Ba2+ sites, which result in degradation of superconducting properties with critical temperature (Tc) of ∼83K and critical current density (Jc) of less than 1MAcm-2 at 77K and self-field. The samples grown at higher temperatures ranging from 775 to 800 °C are found to have strong c-axis orientation with little cation disorder, and subsequently excellent superconducting properties with T c of 88-90K and Jc of 1.2-1.8MAcm-2 at 77K and self-field. © IOP Publishing Ltd.
DOI
10.1088/0953-2048/20/10/006
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자연과학대학 > 물리학전공 > Journal papers
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