Polymerized complex synthesis of a pure 93 K Y2Ba 4Cu7O15-d superconductor without the need of high oxygen pressure and additive catalysts

Pedro Berastegui, Masato Kakihana, Masahiro Yoshimura, Hiromasa Mazaki, Hiroshi Yasuoka, Lars Gunnar Johansson, Sten Eriksson, Lars Börjesson, Mikael Käll

研究成果: Article査読

28 被引用数 (Scopus)

抄録

High-purity ceramic material of the superconducting phase Y 2Ba4Cu7O14.82 (247) has been synthesized at 870°C by the polymerized complex method using neither high oxygen pressure nor additive catalysts. The method is based on the formation of a polymer-metal complex precursor which is prepared through polyesterification between metal citrate complexes and ethylene glycol. Apart from the fact that high oxygen pressure is unnecessary, the present preparation technique offers more convenient and easier fabrication of highly pure 247 material compared with other wet chemical routes since it eliminates many steps such as centrifugation, filtration, aging, and pH control. X-ray diffraction and Raman scattering analyses show that the material is single-phase without any indication of secondary phases. Zero-resistance has been achieved at 88.0 K with a transition width narrower than 4 K. Complex ac magnetic susceptibility measurements confirm the presence of a single bulk superconducting 247 phase with Tc(onset)=93.0 K and ΔTc (10%-90%)=4.5 K.

本文言語English
ページ(範囲)2424-2428
ページ数5
ジャーナルJournal of Applied Physics
73
5
DOI
出版ステータスPublished - 1993
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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