Processing of high-performance (Gd, Y)-Ba-Cu-O bulk superconductors with fine RE211 pinning centers

Shinya Nariki; Naomichi Sakai; Masato Murakami; Izumi Hirabayashi

doi:10.1109/TASC.2005.848970

Processing of high-performance (Gd, Y)-Ba-Cu-O bulk superconductors with fine RE211 pinning centers

Shinya Nariki, Naomichi Sakai, Masato Murakami, Izumi Hirabayashi

Research output: Contribution to journal › Article

8 Citations (Scopus)

Abstract

We have investigated the superconducting properties of (Gd, Y)-Ba-Cu-O bulk superconductors fabricated from precursors of Gd123-Y211 in a reduced oxygen atmosphere. The employment of ball-milled ultra-fine Y211 powder as a precursor material was very effective in enhancing critical current density (J _c), since RE211 inclusions in the melt-textured samples could be drastically refined with decreasing the particle size of Y211 starting powder. The maximum J_c value reached an extremely high value of 380 kA/cm² at 77 K in self-field. However, size reduction of RE211 led to inhomogeneous distribution of RE211 inclusions. The trapped magnetic fields of Ag-added single-grain samples 25 mm and 33 mm in diameters were 1.5 T and 2.0 T at 77 K, respectively.

Original language	English
Pages (from-to)	3110-3113
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	15
Issue number	2 PART III
DOIs	https://doi.org/10.1109/TASC.2005.848970
Publication status	Published - 2005 Jun 1

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Keywords

Current density
Gadolinium compounds
Superconducting materials
Yttrium compounds

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Cite this

Nariki, S., Sakai, N., Murakami, M., & Hirabayashi, I. (2005). Processing of high-performance (Gd, Y)-Ba-Cu-O bulk superconductors with fine RE211 pinning centers. IEEE Transactions on Applied Superconductivity, 15(2 PART III), 3110-3113. https://doi.org/10.1109/TASC.2005.848970

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Access to Document

10.1109/TASC.2005.848970