Microstructures and superconducting properties of melt-processed (RE,RE′)-Ba-Cu-O

T. Saitoh, K. Segawa, K. Kamada, N. Sakai, T. Segawa, S. I. Yoo, M. Murakami

研究成果: Article査読

50 被引用数 (Scopus)

抄録

We have studied the microstructures and superconducting properties of melt-processed (RE,RE′)-Ba-Cu-O composite bulks (RE and RE′ are two different rare earth elements selected from a group of Nd, Sm, Eu, Gd and Y). It was found that the peritectic decomposition temperatures (Tm) of the (RE,RE′)-Ba-Cu-O composites increased linearly with increasing the average ionic radius between two different rare earth elements. Large grain growth was observed in almost all the (RE,RE′)-Ba-Cu-O bulks except those containing Y, when they were melt-processed in a reduced oxygen atmosphere. Compositional analyses revealed that the ratio of RE to RE′ in the (RE,RE′)Ba2Cu3O7-d matrix phase was almost the same as that of the nominal composition, showing that the mixture of the two different rare earth elements was very uniform. All the samples showed onset superconducting transition temperatures (Tc) exceeding 93 K with a sharp transition, and exhibited a secondary peak effect in the M-H loops.

本文言語English
ページ(範囲)141-147
ページ数7
ジャーナルPhysica C: Superconductivity and its applications
288
1-2
DOI
出版ステータスPublished - 1997 8 20
外部発表はい

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
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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