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Chin. Phys. B, 2015, Vol. 24(9): 097401    DOI: 10.1088/1674-1056/24/9/097401
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Strongly enhanced flux pinning in the YBa2Cu3O7-X films with the co-doping of BaTiO3 nanorod and Y2O3 nanoparticles at 65 K

Wang Hong-Yan (王洪艳)a b, Ding Fa-Zhu (丁发柱)a, Gu Hong-Wei (古宏伟)a, Zhang Teng (张腾)a
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
Abstract  YBa2Cu3O7-x (YBCO) films with co-doping BaTiO3 (BTO) and Y2O3 nanostructures were prepared by metal organic deposition using trifluoroacetates (TFA-MOD). The properties of the BTO/Y2O3 co-doped YBCO films with different excess yttrium have been systematically studied by x-ray diffraction (XRD), Raman spectra, and scanning electron microscope (SEM). The optimized content of yttrium excess in the BTO/Y2O3 co-doped YBCO films is 10 mol.%, and the critical current density is as high as ~ 17 mA/cm2 (self-field, 65 K) by the magnetic signal. In addition, the Y2Cu2O5 was formed when the content of yttrium excess increases to 24 mol.%, which may result in the deterioration of the superconducting properties and the microstructure. The unique combination of the different types of nanostructures of BTO and Y2O3 in the doped YBCO films, compared with the pure YBCO films and BTO doped YBCO films, enhances the critical current density (JC) not only at the self-magnetic field, but also in the applied magnetic field.
Keywords:  YBa2Cu3O7-x (YBCO) film      flux pinning      BaTiO3 (BTO) and Y2O3 nanostructures      metal organic deposition using trifluoroacetates (TFA-MOD)  
Received:  10 December 2014      Revised:  30 March 2015      Accepted manuscript online: 
PACS:  74.78.-w (Superconducting films and low-dimensional structures)  
  81.16.Dn (Self-assembly)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51272250), the National Basic Research Program of China (Grant No. 2011CBA00105), the National High Technology Research and Development Program of China (Grant No. 2014AA032702), and the Natural Science Foundation of Beijing, China (Grant No. 2152035).
Corresponding Authors:  Ding Fa-Zhu, Gu Hong-Wei     E-mail:  dingfazhu@mail.iee.ac.cn;guhw@mail.iee.ac.cn

Cite this article: 

Wang Hong-Yan (王洪艳), Ding Fa-Zhu (丁发柱), Gu Hong-Wei (古宏伟), Zhang Teng (张腾) Strongly enhanced flux pinning in the YBa2Cu3O7-X films with the co-doping of BaTiO3 nanorod and Y2O3 nanoparticles at 65 K 2015 Chin. Phys. B 24 097401

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