Improvement of superconducting properties by BaTiO3 doping into ErBa2Cu3O7-δ films

Y. Shingai, T. Abe, M. Mukaida, R. Kita, Y. Yoshida, A. Ichinose, S. Horii, K. Matsumoto, A. Saito, K. Yamada, N. Mori

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3 Citations (Scopus)

Abstract

We have improved surface resistance (RS) properties of ErBa2Cu3O7-δ (ErBCO) films by using BaTiO3 (BTO) doping (BTO + ErBCO). The as-grown BTO + ErBCO films did not have enough carriers. We solve this problem by using O3 + O2 as background gas during the growth of BTO + ErBCO films. Then, O3 + O2 gas is useful to grow BTO + ErBCO films with superior superconducting properties. The RS of a 2 wt.%BTO + ErBCO film is the lowest in BTO + ErBCO films grown in this study. This value is equal to that of a 1.5 wt.%BZO + ErBCO film. The microstructures of the 2 wt.%BTO + ErBCO film are observed by transmission electron microscopy (TEM). In the image, the BTO + ErBCO films did not have the same nanorods as observed in the BZO + ErBCO films against our expectation. However, precipitates that the BZO + ErBCO films do not have, are observed.

Original languageEnglish
Pages (from-to)841-844
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume445-448
Issue number1-2
DOIs
Publication statusPublished - Oct 1 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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