TY - JOUR
T1 - A new technique for pinning enhancement in ternary REBa2Cu3Oy systems
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.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/10/1
Y1 - 2002/10/1
N2 - We have studied the effects of sub-micron Gd2BaCuO5 (Gd-211) particles on the microstructure and the magnetic properties of ternary melt-textured superconductors (Nd0.33Eu0.33Gd0.33)Ba2Cu3 Oy, (Nd0.33Sm0.33Gd0.33)Ba2Cu3 Oy, and (Sm0.33Eu0.33Gd0.33)Ba2Cu3 Oy. High-resolution transmission electron microscopic observations showed that there is strong compositional fluctuation in the REBa2Cu3Oy matrix, and the RE rich clusters 3-10 nm in size are distributed in the matrix, which are the candidates for pinning centers. Magnetization measurements revealed that a strongly developed fishtail is observed in all the samples. The peak position, its height, and irreversibility field is dependent on the chemical composition. The NSG-123 sample with 10 mol% Gd-211 exhibited the critical current density of 100 kAcm-2 at 77 K and 2 T for H∥c-axis.
AB - We have studied the effects of sub-micron Gd2BaCuO5 (Gd-211) particles on the microstructure and the magnetic properties of ternary melt-textured superconductors (Nd0.33Eu0.33Gd0.33)Ba2Cu3 Oy, (Nd0.33Sm0.33Gd0.33)Ba2Cu3 Oy, and (Sm0.33Eu0.33Gd0.33)Ba2Cu3 Oy. High-resolution transmission electron microscopic observations showed that there is strong compositional fluctuation in the REBa2Cu3Oy matrix, and the RE rich clusters 3-10 nm in size are distributed in the matrix, which are the candidates for pinning centers. Magnetization measurements revealed that a strongly developed fishtail is observed in all the samples. The peak position, its height, and irreversibility field is dependent on the chemical composition. The NSG-123 sample with 10 mol% Gd-211 exhibited the critical current density of 100 kAcm-2 at 77 K and 2 T for H∥c-axis.
KW - Critical current density
KW - Flux pinning
KW - Gd-211
KW - Melt-textured
KW - REBaCuO
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U2 - 10.1016/S0921-4534(02)01509-5
DO - 10.1016/S0921-4534(02)01509-5
M3 - Article
AN - SCOPUS:17644433373
VL - 378-381
SP - 627
EP - 630
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - PART 1
ER -