Crystal growth and pinning enhancement of directionally melt-textured (Y0.5Nd0.25Sm0.25)Ba2Cu3Oyoxides in air

So-Jung Kim (김소정)

Crystal growth and pinning enhancement of directionally melt-textured (Y0.5Nd0.25Sm0.25)Ba2Cu3Oyoxides in air

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2005, 15(5), pp.188~192
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering

So-Jung Kim ¹

¹한중대학교

Accredited

ABSTRACT

High Tc (Y0.5Nd0.25Sm0.25)Ba2Cu3Oy [(YNS)-123] superconductors with/without CeO2 additive were systematically investigated by the zone melt growth process in air. Cylindrical green rods of (YNS)-123 oxides were fabricated by cold isostatic pressing (CIP) method using rubber mould. A sample prepared by this method showed well-textured microstructure, and (Y0.5Nd0.25Sm0.25)2BaCuO5 [(YNS)211] nonsuperconducting inclusions were uniformly dispersed in large (Y0.5Nd0.25Sm0.25)Ba2Cu3Oy [(YNS)123] superconducting matrix. In this study, optimum melting temperature and growth rate were 1100oC and 3 mm/hr, respectively. The directionally melt-textured (YNS)-123 sample with CeO2 additive showed an onset critical temperature (Tc) Tc ≥ 93 K and sharp superconducting transition.

KEYWORDS

(Y0.5Nd0.25Sm0.25)Ba2Cu3Oy, Zone melt growth, (Y0.5Nd0.25Sm0.25)2BaCuO5, CIP, CeO2 additive.

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Journal of the Korean Crystal Growth and Crystal Technology 2025 KCI Impact Factor : 0.14 KCI-WoS Impact Factor : 0.45