Microstructure and flux pinning in oxygen-controlled melt-growth processed (Nd0.33Eu0.33Gd0.33)Ba2 Cu3Oy

M. Muralidhar; M. Murakami

doi:10.1016/S0921-4534(01)00614-1

Microstructure and flux pinning in oxygen-controlled melt-growth processed (Nd_0.33Eu_0.33Gd_0.33)Ba₂ Cu₃O_y

M. Muralidhar, M. Murakami

Research output: Contribution to journal › Article

10 Citations (Scopus)

Abstract

We fabricated single-domain (Nd_0.33Eu_0.33Gd_0.33)Ba₂ Cu₃O_y (NEG123) bulk superconductors with a top-seeded melt-growth process in Ar-0.1%O₂ atmosphere using melt-textured Nd-123 as a seed crystal. We added a variety of secondary phase particles ((Nd,Eu,Gd)211, (Eu,Gd)211, Eu211, Gd211) in different amounts to the NEG123. Scanning electron microscopy observations demonstrated that the morphology, the particle size, and the distribution were strongly dependent on the concentration and the type of secondary phase. In addition, the chemical analyses revealed that the matrix composition also changes with the secondary phase particles. They also strongly affected the critical current density (J_c) and the irreversibility fields. The self-field and peak J_c values will be discussed with relation to the type of pinning mechanisms.

Original language	English
Pages (from-to)	19-24
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	363
Issue number	1
DOIs	https://doi.org/10.1016/S0921-4534(01)00614-1
Publication status	Published - 2001 Oct 15

Keywords

(Nd,Eu,Gd)BaCuO
Critical current density (J)
Flux pinning
Microstructure
Secondary phase

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Muralidhar, M., & Murakami, M. (2001). Microstructure and flux pinning in oxygen-controlled melt-growth processed (Nd_0.33Eu_0.33Gd_0.33)Ba₂ Cu₃O_y. Physica C: Superconductivity and its applications, 363(1), 19-24. https://doi.org/10.1016/S0921-4534(01)00614-1

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abstract = "We fabricated single-domain (Nd0.33Eu0.33Gd0.33)Ba2 Cu3Oy (NEG123) bulk superconductors with a top-seeded melt-growth process in Ar-0.1%O2 atmosphere using melt-textured Nd-123 as a seed crystal. We added a variety of secondary phase particles ((Nd,Eu,Gd)211, (Eu,Gd)211, Eu211, Gd211) in different amounts to the NEG123. Scanning electron microscopy observations demonstrated that the morphology, the particle size, and the distribution were strongly dependent on the concentration and the type of secondary phase. In addition, the chemical analyses revealed that the matrix composition also changes with the secondary phase particles. They also strongly affected the critical current density (Jc) and the irreversibility fields. The self-field and peak Jc values will be discussed with relation to the type of pinning mechanisms.",

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AB - We fabricated single-domain (Nd0.33Eu0.33Gd0.33)Ba2 Cu3Oy (NEG123) bulk superconductors with a top-seeded melt-growth process in Ar-0.1%O2 atmosphere using melt-textured Nd-123 as a seed crystal. We added a variety of secondary phase particles ((Nd,Eu,Gd)211, (Eu,Gd)211, Eu211, Gd211) in different amounts to the NEG123. Scanning electron microscopy observations demonstrated that the morphology, the particle size, and the distribution were strongly dependent on the concentration and the type of secondary phase. In addition, the chemical analyses revealed that the matrix composition also changes with the secondary phase particles. They also strongly affected the critical current density (Jc) and the irreversibility fields. The self-field and peak Jc values will be discussed with relation to the type of pinning mechanisms.

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