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

doi:10.1088/1674-1056/24/9/097401

Abstract YBa₂Cu₃O_7-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 (J_C) not only at the self-magnetic field, but also in the applied magnetic field.

Keywords: YBa₂Cu₃O_7-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 YBa₂Cu₃O_7-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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Strongly enhanced flux pinning in the YBa2Cu3O7-X films with the co-doping of BaTiO3 nanorod and Y2O3 nanoparticles at 65 K

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Strongly enhanced flux pinning in the YBa₂Cu₃O_7-X films with the co-doping of BaTiO₃ nanorod and Y₂O₃ nanoparticles at 65 K