Flux Pinning Properties in Y<sub>2</sub>BaCuO<sub>5</sub>-Doped YBa<sub>2</sub>Cu<sub>3</sub>O<i><sub>y</sub></i> Films Fabricated with Vapor-Liquid-Solid Growth Method

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  • Tsuchiya Yuji
    Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University
  • Tajiri Shuya
    Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University
  • Ichino Yusuke
    Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University
  • Ichinose Ataru
    Central Research Institute of Electric Power Industry
  • Yoshida Yutaka
    Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University

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Other Title
  • Vapor-Liquid-Solid成長法を用いて作製したY<sub>2</sub>BaCuO<sub>5</sub>を添加したYBa<sub>2</sub>Cu<sub>3</sub>O<i><sub>y</sub></i>高温超伝導薄膜の磁束ピンニング特性
  • Vapor-Liquid-Solid成長法を用いて作製したY₂BaCuO₅を添加したYBa₂Cu₃O[y]高温超伝導薄膜の磁束ピンニング特性
  • Vapor-Liquid-Solid セイチョウホウ オ モチイテ サクセイ シタ Y ₂ BaCuO ₅ オ テンカ シタ YBa ₂ Cu ₃ O[y]コウオン チョウデンドウ ハクマク ノ ジソク ピンニング トクセイ

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Abstract

<p>High-temperature superconducting REBa2Cu3Oy (RE: Rare earth elements, REBCO) films need both a high-speed film fabrication with a well-oriented crystalline texture and an introduction of artificial pinning centers (APCs) to improve critical current densities Jcs in magnetic fields．A vapor-liquid-solid (VLS) growth method enables the REBCO films to grow rapidly with a high quality but makes it difficult to introduce the APCs．In this study, Y2BaCuO5 (Y211) was doped into YBa2Cu3Oy (Y123) films fabricated via the VLS method with a liquid layer of Ba3Cu7O10．A microstructure analysis revealed that nano-particle APCs with diameter less than 10 nm were successfully introduced into the YBCO films．The Y211-doped Y123 films show the highest critical temperature Tc and the Jc in magnetic fields with a chemical composition ratio close to the stoichiometry of Y123.</p>

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