Influences of Y 2 O 3 nanoparticle additions on the microstructure and superconductivity of YBCO films derived from low-fluorine solution
Materials Chemistry and Physics, ISSN: 0254-0584, Vol: 127, Issue: 1, Page: 91-94
2011
- 25Citations
- 15Captures
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Article Description
Low-fluorine YBCO precursor solutions with metallic ion molar ratio of Y 3+ :Ba 2+ :Cu 2+ = (1 + λ ):2:3 ( λ = 0, 0.05, 0.1, 0.15, 0.2, 0.3) were prepared using fluorine-free yttrium acetate, copper acetate and fluorinated Ba-TFA as starting materials. Using the yttrium-excess YBCO solutions, YBCO–Y 2 O 3 nanocomposite films were prepared on (0 0 1)-oriented LaAlO 3 single-crystal substrates by dip-coating process. The growth orientation and microstructure of the as-prepared YBCO–Y 2 O 3 nanocomposite films were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Both the electrical transport and magnetization methods were used to measure the superconducting performance of the films. The results show that Y 2 O 3 nanoparticles with the diameter of 5–6 nm are formed and well dispersed in YBCO matrix. These nanoscaled Y 2 O 3 nanoparticles and the induced nano-sized crystal defects can act as the flux pinning centers, thus leading to the improvement of critical current density J c of YBCO films at all magnetic field orientations.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0254058411000484; http://dx.doi.org/10.1016/j.matchemphys.2011.01.030; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=79952989240&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0254058411000484; https://dx.doi.org/10.1016/j.matchemphys.2011.01.030
Elsevier BV
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