Ionic cluster effect in suppression on superconductivity in Ni- and Co-doped YBCO systems

Автор(и)

  • Aihua Wang School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
  • Xiaoxia Wang School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
  • Yigang Cao School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
  • Xinli Li School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
  • Yongyong Wang School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
  • Liming Gao School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
  • Heqiang Lu School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
  • Jie Zhang School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
  • Pinglin Li School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.2889400

Ключові слова:

YBCO, ionic cluster effect, simulations, positron annihilation.

Анотація

We adopted the x-ray diffraction, oxygen contents, positron annihilation technology as well as simulation methods to investigate systemically YBa2Cu3-x(Ni,Co)xO7-d (x = 0-0.5). The simulated results show that ions distribute in dispersive form in little doped concentration. As doped concentration increases, ions combine into clusters in the crystal lattice. The calculated results and oxygen contents, together with the impure phases and the local electron density ne, show the ionic cluster effect, which not only causes the local electron density to reach the saturation, but also suppress the superconductivity significantly.

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Опубліковано

2008-01-24

Як цитувати

(1)
Aihua Wang, Xiaoxia Wang, Yigang Cao, Xinli Li, Yongyong Wang, Liming Gao, Heqiang Lu, Jie Zhang, and Pinglin Li, Ionic cluster effect in suppression on superconductivity in Ni- and Co-doped YBCO systems, Low Temp. Phys. 34, (2008) [Fiz. Nizk. Temp. 34, 219-224, (2008)] DOI: https://doi.org/10.1063/1.2889400.

Номер

Том 34 № 3 (2008)

Розділ

Надпровідність, зокрема високотемпературна

Завантаження

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