Melt processing and enhanced superconducting properties of single domain (Sm0.5Eu0.5)123 superconductors fabricated in air

A. Hu; N. Sakai; M. Murakami

doi:10.1088/0953-2048/15/5/307

Melt processing and enhanced superconducting properties of single domain (Sm_0.5Eu_0.5)123 superconductors fabricated in air

A. Hu, N. Sakai, M. Murakami

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

High-quality single domain (Sm_0.5Eu_0.5)Ba₂Cu₃O_7-δ superconductors were grown in air with a thermal gradient. We found that the substitution of Ba by rare earth (RE) elements was considerably suppressed when the growth rate is large. Enhanced superconducting properties were obtained by further controlling initial compositions and combining a post-annealing in Ar. The crystals exhibited a high T_c value of 95 K with a sharp superconducting transition, and a well-developed secondary peak effect in the J_c-B curve at 77 K. TEM observation revealed that the nano-sized chemical variation between RE and Ba provided robust flux pinning.

Original language	English
Pages (from-to)	675-678
Number of pages	4
Journal	Superconductor Science and Technology
Volume	15
Issue number	5
DOIs	https://doi.org/10.1088/0953-2048/15/5/307
Publication status	Published - 2002 May 1
Externally published	Yes

ASJC Scopus subject areas

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

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abstract = "High-quality single domain (Sm0.5Eu0.5)Ba2Cu3O7-δ superconductors were grown in air with a thermal gradient. We found that the substitution of Ba by rare earth (RE) elements was considerably suppressed when the growth rate is large. Enhanced superconducting properties were obtained by further controlling initial compositions and combining a post-annealing in Ar. The crystals exhibited a high Tc value of 95 K with a sharp superconducting transition, and a well-developed secondary peak effect in the Jc-B curve at 77 K. TEM observation revealed that the nano-sized chemical variation between RE and Ba provided robust flux pinning.",

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N2 - High-quality single domain (Sm0.5Eu0.5)Ba2Cu3O7-δ superconductors were grown in air with a thermal gradient. We found that the substitution of Ba by rare earth (RE) elements was considerably suppressed when the growth rate is large. Enhanced superconducting properties were obtained by further controlling initial compositions and combining a post-annealing in Ar. The crystals exhibited a high Tc value of 95 K with a sharp superconducting transition, and a well-developed secondary peak effect in the Jc-B curve at 77 K. TEM observation revealed that the nano-sized chemical variation between RE and Ba provided robust flux pinning.

AB - High-quality single domain (Sm0.5Eu0.5)Ba2Cu3O7-δ superconductors were grown in air with a thermal gradient. We found that the substitution of Ba by rare earth (RE) elements was considerably suppressed when the growth rate is large. Enhanced superconducting properties were obtained by further controlling initial compositions and combining a post-annealing in Ar. The crystals exhibited a high Tc value of 95 K with a sharp superconducting transition, and a well-developed secondary peak effect in the Jc-B curve at 77 K. TEM observation revealed that the nano-sized chemical variation between RE and Ba provided robust flux pinning.

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