Superconducting Properties and Microstructures of Pb-Doped Bi2Sr2Ca1Cu2Ox Spherical Particles Prepared by Containerless Solidification and Annealing.

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  • Hishinuma Yoshimitsu
    University of Tsukuba, Cooperative Graduate School, 1–1–1 Tennodai, Tsukuba 305–0006, Japan CREST, Japan Science and Technology Corporation (JST), 2–1–6 Sengen, Tsukuba 305–0047, Japan
  • Fujii Hiroki
    National Research Institute for Metals, 1–2–1 Sengen, Tsukuba 305–0047, Japan CREST, Japan Science and Technology Corporation (JST), 2–1–6 Sengen, Tsukuba 305–0047, Japan
  • Matsumoto Akiyoshi
    National Research Institute for Metals, 1–2–1 Sengen, Tsukuba 305–0047, Japan CREST, Japan Science and Technology Corporation (JST), 2–1–6 Sengen, Tsukuba 305–0047, Japan
  • Hirata Kazuto
    National Research Institute for Metals, 1–2–1 Sengen, Tsukuba 305–0047, Japan CREST, Japan Science and Technology Corporation (JST), 2–1–6 Sengen, Tsukuba 305–0047, Japan
  • Takeya Hiroyuki
    National Research Institute for Metals, 1–2–1 Sengen, Tsukuba 305–0047, Japan CREST, Japan Science and Technology Corporation (JST), 2–1–6 Sengen, Tsukuba 305–0047, Japan
  • Kumakura Hiroaki
    National Research Institute for Metals, 1–2–1 Sengen, Tsukuba 305–0047, Japan CREST, Japan Science and Technology Corporation (JST), 2–1–6 Sengen, Tsukuba 305–0047, Japan
  • Togano Kazumasa
    University of Tsukuba, Cooperative Graduate School, 1–1–1 Tennodai, Tsukuba 305–0006, Japan National Research Institute for Metals, 1–2–1 Sengen, Tsukuba 305–0047, Japan CREST, Japan Science and Technology Corporation (JST), 2–1–6 Sengen, Tsukuba 305–0047, Japan

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  • Superconducting Properties and Microstr
  • Superconducting Properties and Microstructures of Pb-Doped Bi<sub>2</sub>Sr<sub>2</sub>Ca<sub>1</sub>Cu<sub>2</sub>O<sub>x</sub> Spherical Particles Prepared by Containerless Solidification and Annealing

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The superconducting properties and microstructures of Pb-doped Bi-2212 spherical particles prepared by containerless solidification and subsequent annealing were investigated. After solidification, the spherical particles are present in an amorphous state which can be transformed into the Bi-2212 phase by annealing at temperatures above 800°C. The Pb-doped spherical particles show an improved flux pinning behavior which is considered to arise from the modification of the modulation structure.

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