TY - JOUR
T1 - Microstructure and flux pinning in oxygen-controlled melt-growth processed (Nd0.33Eu0.33Gd0.33)Ba2 Cu3Oy
AU - Muralidhar, M.
AU - Murakami, M.
N1 - Funding Information:
This work was supported by New Energy and Industrial Technology Development Organization (NEDO) as a part of its research and development of fundamental technologies for superconductor applications project under the New Sunshine Program administrated by the Agency of Industrial Science and Technologies MITI of Japan.
Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
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
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U2 - 10.1016/S0921-4534(01)00614-1
DO - 10.1016/S0921-4534(01)00614-1
M3 - Article
AN - SCOPUS:0035887728
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 -