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

Research output: Contribution to journalArticle

10 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)19-24
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume363
Issue number1
DOIs
Publication statusPublished - 2001 Oct 15
Externally publishedYes

Fingerprint

Flux pinning
flux pinning
Superconducting materials
Particle size
Oxygen
Crystals
microstructure
Microstructure
Scanning electron microscopy
oxygen
Chemical analysis
seeds
critical current
current density
atmospheres
scanning electron microscopy
matrices
crystals

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

@article{3c1df856644a41339b785f4ecd5c93b6,
title = "Microstructure and flux pinning in oxygen-controlled melt-growth processed (Nd0.33Eu0.33Gd0.33)Ba2 Cu3Oy",
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.",
keywords = "(Nd,Eu,Gd)BaCuO, Critical current density (J), Flux pinning, Microstructure, Secondary phase",
author = "Muralidhar Miryala and Masato Murakami",
year = "2001",
month = "10",
day = "15",
doi = "10.1016/S0921-4534(01)00614-1",
language = "English",
volume = "363",
pages = "19--24",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Microstructure and flux pinning in oxygen-controlled melt-growth processed (Nd0.33Eu0.33Gd0.33)Ba2 Cu3Oy

AU - Miryala, Muralidhar

AU - Murakami, Masato

PY - 2001/10/15

Y1 - 2001/10/15

N2 - 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.

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.

KW - (Nd,Eu,Gd)BaCuO

KW - Critical current density (J)

KW - Flux pinning

KW - Microstructure

KW - Secondary phase

UR - http://www.scopus.com/inward/record.url?scp=0035887728&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035887728&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(01)00614-1

DO - 10.1016/S0921-4534(01)00614-1

M3 - Article

VL - 363

SP - 19

EP - 24

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 1

ER -