Precursor evolution and growth mechanism of BTO/YBCO films by TFA-MOD process

In this study, BaTiO3 （BTO）-doped YBCO films are prepared on LaA103 （100） single-crystal substrates by metal- organic decomposition （MOD） using trifluoroacetate （TFA） precursor solutions. The critical current density （Jc） of BTO/YBCO film is as high as 10 MA/cm2 （77 K, 0 T）. The BTO peak is found in...

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Published inChinese physics B Vol. 23; no. 10; pp. 503 - 507
Main Author 王洪艳 丁发柱 古宏伟 张腾 彭星煜
Format Journal Article
LanguageEnglish
Published 01.10.2014
Subjects
Barium titanates
BTO
COPPER OXIDE
Critical current density
CURRENT DENSITY
Decomposition
DENSITY
ELECTRICAL CONDUCTIVITY
Evolution
Nanoparticles
PARTICLES
Precursors
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TFA-MOD
X RAYS
YBCO superconductors
YBCO薄膜
YTTRIUM OXIDE
临界电流密度
前体
机制
溶液制备
进化
Online AccessGet full text
ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/23/10/107402

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Summary:In this study, BaTiO3 （BTO）-doped YBCO films are prepared on LaA103 （100） single-crystal substrates by metal- organic decomposition （MOD） using trifluoroacetate （TFA） precursor solutions. The critical current density （Jc） of BTO/YBCO film is as high as 10 MA/cm2 （77 K, 0 T）. The BTO peak is found in the X-ray diffraction （XRD） pattern of a final YBCO superconductivity film. Moreover, a comprehensive study of the precursor evolution is conducted mainly by X-ray analysis and μ-Raman spectroscopy. It is found that the TFA begins to decompose at the beginning of the thermal process, and then further decomposes as temperature increases, and at 700 ℃ BTO nanoparticles begin to appear. It sug- gests that the YBCO film embedded with BTO nanoparticles, whose critical current density （Jc） is enhanced, is successfully prepared by an easily scalable chemical solution deposition technique.
Bibliography:In this study, BaTiO3 （BTO）-doped YBCO films are prepared on LaA103 （100） single-crystal substrates by metal- organic decomposition （MOD） using trifluoroacetate （TFA） precursor solutions. The critical current density （Jc） of BTO/YBCO film is as high as 10 MA/cm2 （77 K, 0 T）. The BTO peak is found in the X-ray diffraction （XRD） pattern of a final YBCO superconductivity film. Moreover, a comprehensive study of the precursor evolution is conducted mainly by X-ray analysis and μ-Raman spectroscopy. It is found that the TFA begins to decompose at the beginning of the thermal process, and then further decomposes as temperature increases, and at 700 ℃ BTO nanoparticles begin to appear. It sug- gests that the YBCO film embedded with BTO nanoparticles, whose critical current density （Jc） is enhanced, is successfully prepared by an easily scalable chemical solution deposition technique.
Wang Hong-Yan, Ding Fa-Zhu, Gu Hong-Wei, Zhang Teng, and Peng Xing-Yu（ a） Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China b ） University of Chinese Academy of Sciences, Beijing 100049, China
11-5639/O4
YBa2Cu3O7-x, precursor evolution, BaTiO3, TFA-MOD
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/10/107402