基板自己抵抗加熱方式 PLD 法を用いて 基板温度及びパルスあたりの蒸着量を変化させた BaHfO<sub>3</sub> 添加 YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub> 薄膜における磁束ピンニング特性

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  • Flux Pinning Properties of BaHfO<sub>3</sub>-Doped YBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub> Coated Conductors Fabricated at Various Substrate Temperature and Thickness Per Pulse by Pulsed Laser Deposition with Substrate Self-Heating Technique

抄録

<p>In superconducting coil applications, magnetic fields are applied to superconducting material from various directions. YBa2Cu3Oy (YBCO) coated conductor containing BaHO3 (BHO) flux pinning centers is expected to be used as coil application. In this study, BHO-doped YBCO films were prepared by changing the substrate temperature (Ts) and thickness per pulse (tpulse) using the pulsed laser deposition method. As a result, the isotropy of the critical current density vs field angle (Jc-θ) curve was improved in the BHO-doped YBCO film fabricated under the condition of low Ts and high tpulse. In the cross-sectional transmission electron microscopic observation, it was confirmed that BHO nanorods with gradually increasing tilt angles grew in BHO-doped YBCO film. The surface atomic force microscope images also confirmed that YBCO grains grew in three-dimensional island growth. The shape of BHO is determined by the growth rate of YBCO and BHO, which affects the tilt angle of the BHO nanorods.</p>

収録刊行物

  • 低温工学

    低温工学 57 (6), 375-381, 2022

    公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)

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