Superconducting properties of (Gd, Nd)-Ba-Cu-O bulk superconductor fabricated by melt processing in air

S. Nariki; S. J. Seo; N. Sakai; M. Murakami

doi:10.1088/0953-2048/13/6/329

Superconducting properties of (Gd, Nd)-Ba-Cu-O bulk superconductor fabricated by melt processing in air

S. Nariki, S. J. Seo, N. Sakai, M. Murakami

Research output: Contribution to journal › Conference article › peer-review

8 Citations (Scopus)

Abstract

Superconducting properties of melt-textured (Gd, Nd)-Ba-Cu-O have been studied. Bulk samples were fabricated from precursors of Gd123-Nd422 with Ag₂O, Pt and CeO₂ in air. Ba-rich Nd422ss (Nd_3.6Ba_2.4Cu_1.8O_10-δ) was also used as a starting material. The onset T_c for the bulk sample with stoichiometric Nd422 was only about 80 K. The employment of Ba-rich Nd422ss instead of Nd422 enabled the formation of the high-T_c phase even by melt-texturing in air. Lattice parameters for the 123 phase suggested that the sample with stoichiometric Nd422 formed a LRE_1+xBa_2-xCu₃O_y-type low-T_c solid solution, while the LRE-Ba substitution was suppressed in the sample with Ba-rich Nd422ss. The J_c-B curve for the sample with Ba-rich Nd422ss exhibited a secondary peak effect in about 1 T and 77 K, and the J_c value was larger than that of Gd-Ba-Cu-O bulk prepared in air.

Original language	English
Pages (from-to)	774-777
Number of pages	4
Journal	Superconductor Science and Technology
Volume	13
Issue number	6
DOIs	https://doi.org/10.1088/0953-2048/13/6/329
Publication status	Published - 2000 Jun 1
Externally published	Yes
Event	The 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials - Morioka, Jpn Duration: 1999 Oct 19 → 1999 Oct 22

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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title = "Superconducting properties of (Gd, Nd)-Ba-Cu-O bulk superconductor fabricated by melt processing in air",

abstract = "Superconducting properties of melt-textured (Gd, Nd)-Ba-Cu-O have been studied. Bulk samples were fabricated from precursors of Gd123-Nd422 with Ag2O, Pt and CeO2 in air. Ba-rich Nd422ss (Nd3.6Ba2.4Cu1.8O10-δ) was also used as a starting material. The onset Tc for the bulk sample with stoichiometric Nd422 was only about 80 K. The employment of Ba-rich Nd422ss instead of Nd422 enabled the formation of the high-Tc phase even by melt-texturing in air. Lattice parameters for the 123 phase suggested that the sample with stoichiometric Nd422 formed a LRE1+xBa2-xCu3Oy-type low-Tc solid solution, while the LRE-Ba substitution was suppressed in the sample with Ba-rich Nd422ss. The Jc-B curve for the sample with Ba-rich Nd422ss exhibited a secondary peak effect in about 1 T and 77 K, and the Jc value was larger than that of Gd-Ba-Cu-O bulk prepared in air.",

author = "S. Nariki and Seo, {S. J.} and N. Sakai and M. Murakami",

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T1 - Superconducting properties of (Gd, Nd)-Ba-Cu-O bulk superconductor fabricated by melt processing in air

AU - Nariki, S.

AU - Seo, S. J.

AU - Sakai, N.

AU - Murakami, M.

PY - 2000/6/1

Y1 - 2000/6/1

N2 - Superconducting properties of melt-textured (Gd, Nd)-Ba-Cu-O have been studied. Bulk samples were fabricated from precursors of Gd123-Nd422 with Ag2O, Pt and CeO2 in air. Ba-rich Nd422ss (Nd3.6Ba2.4Cu1.8O10-δ) was also used as a starting material. The onset Tc for the bulk sample with stoichiometric Nd422 was only about 80 K. The employment of Ba-rich Nd422ss instead of Nd422 enabled the formation of the high-Tc phase even by melt-texturing in air. Lattice parameters for the 123 phase suggested that the sample with stoichiometric Nd422 formed a LRE1+xBa2-xCu3Oy-type low-Tc solid solution, while the LRE-Ba substitution was suppressed in the sample with Ba-rich Nd422ss. The Jc-B curve for the sample with Ba-rich Nd422ss exhibited a secondary peak effect in about 1 T and 77 K, and the Jc value was larger than that of Gd-Ba-Cu-O bulk prepared in air.

AB - Superconducting properties of melt-textured (Gd, Nd)-Ba-Cu-O have been studied. Bulk samples were fabricated from precursors of Gd123-Nd422 with Ag2O, Pt and CeO2 in air. Ba-rich Nd422ss (Nd3.6Ba2.4Cu1.8O10-δ) was also used as a starting material. The onset Tc for the bulk sample with stoichiometric Nd422 was only about 80 K. The employment of Ba-rich Nd422ss instead of Nd422 enabled the formation of the high-Tc phase even by melt-texturing in air. Lattice parameters for the 123 phase suggested that the sample with stoichiometric Nd422 formed a LRE1+xBa2-xCu3Oy-type low-Tc solid solution, while the LRE-Ba substitution was suppressed in the sample with Ba-rich Nd422ss. The Jc-B curve for the sample with Ba-rich Nd422ss exhibited a secondary peak effect in about 1 T and 77 K, and the Jc value was larger than that of Gd-Ba-Cu-O bulk prepared in air.

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Superconducting properties of (Gd, Nd)-Ba-Cu-O bulk superconductor fabricated by melt processing in air

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