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Characterization of co-evaporated SmBa2Cu3O 7 coated conductors by polarized-raman scattering spectroscopy

Title
Characterization of co-evaporated SmBa2Cu3O 7 coated conductors by polarized-raman scattering spectroscopy
Authors
Kim G.Jo W.Ha H.-S.Oh S.S.Park D.Y.Cheong H.
Ewha Authors
조윌렴
SCOPUS Author ID
조윌렴scopus
Issue Date
2011
Journal Title
IEEE Transactions on Applied Superconductivity
ISSN
1051-8223JCR Link
Citation
vol. 21, no. 3 PART 3, pp. 3352 - 3355
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
SmBa2Cu3O7(SmBCO)-coated conductors were grown on IBAD-MgO templates by in-situ co-evaporation using a drum-in-dual-chambers system. The conductors, which had a coating thickness of up to 3 μ, showed a critical temperature of 92 ̃ 94 K and a critical current of 150 ̃ 625 A/cm-w at 77 K in a self-field. The phonon modes and cation disorder of the SmBCO-coated conductors were examined by polarized Raman scattering spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy. XRD showed (00l) peaks for the SmBCO phase. The Raman spectra revealed common vibration modes, including Ba-Ba stretching, Cu2-Cu2 stretching, O(2)+/O(3)-, and apical O(4) modes. In addition, polarized-Raman spectra were obtained to examine the crystal orientation and grain growth behavior. Structural information from the Raman spectra turned out to be useful to determine the optimal thickness of SmBCO-coated conductors with high critical currents. © 2010 IEEE.
DOI
10.1109/TASC.2010.2089480
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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