Study of growth process for YBa2Cu3Oy Coated Conductors with BaZrO3 Flux Pinning Centers by Monitoring Electrical Conductivity

Ryo Teranishi, Kazuki Konya, Masayoshi Inoue, Yukio Sato, Kenji Kaneko, Teruo Izumi, Satoshi Awaji

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Abstract

YBa2Cu3Oy (YBCO) coated conductors were prepared by a metal organic deposition method using a chemical solution with tri-fluoroacetate salts. A salt of Zr was also added into the solution to introduce BaZrO3 (BZO) flux pinning centers into the YBCO films. The solution was coated on CeO2/LaMnO3/MgO/Gd2Zr2O7/Hastelloy substrates, and the coated films were crystallized at 1053 K. In this work, an additional holding temperature step was introduced during the crystallization of the films at 873 K to miniaturize the size of BZO nanoparticles, and then the effect of the heat treatment on the electrical conductivity of the film during the crystallization was examined. It was found that the conductivity of the film with the additional holding temperature step was approximately 1.7 times higher than that of the film fabricated without the one when the film temperature reached the crystallization temperature of 1053 K. In addition, the period until the conductivity saturated was three times smaller for the film fabricated with the additional holding temperature step. These results indicate that the growth temperature of YBCO shifts down and the holding period for YBCO crystallization can be shorter by introducing an additional holding temperature step.

Original languageEnglish
Article number7501305
JournalIEEE Transactions on Applied Superconductivity
Volume28
Issue number4
DOIs
Publication statusPublished - Jun 1 2018

All Science Journal Classification (ASJC) codes

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

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