Effects of Fullerene Addition on Pinning Properties and Microstructures in Melt-Textured Y-Ba-Cu-O Superconductors

Kazuo Inoue, Mikihito Tanichi, Muralidhar Miryala, Masato Murakami

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Bulk Y-Ba-Cu-O superconductors have significant potential for engineering applications due to high critical current density (Jc) and high trapped magnetic fields, which is attributed to the presence of pinning centers such as micro-sized Y2BaCuO5 (Y211) inclusions. The introduction of nanosized particles is known to function as more effective pinning centers than micro-sized ones. It has been reported that Jc values were enhanced with the addition of nanosized particles such as ZrO2 and Y2Ba4CuMOy (M = Nb, Zr, etc.) in the YBa2Cu3Ox (Y123) matrix. We have focused on nanocarbon as another candidate of the pinning center and reported that the addition of carbon nanotube (CNT) and nanodiamond led to the enhancement of Jc in Y-Ba-Cu-O superconductors. Fullerene (C60) is also expected to improve the flux pinning performance. We then fabricated melt-processed Y-Ba-Cu-O bulk samples with the addition of fullerene and investigated the pinning properties and microstructures. SEM observation showed that nanosized particles were distributed in the Y123 matrix. Jc exhibited the highest values for the sample with 1.0 wt% fullerene addition. These results suggest that fullerenes act as effective pinning centers.

本文言語English
論文番号8477073
ジャーナルIEEE Transactions on Applied Superconductivity
29
3
DOI
出版ステータスPublished - 2019 4月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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