TY - JOUR
T1 - Homogeneous distribution of 211 secondary-phase particles in single-grain melt-grown (Nd,Eu,Gd)Ba2Cu3O7 bulk
AU - Diko, P.
AU - Muralidhar, M.
AU - Koblischka, M. R.
AU - Murakami, M.
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO). PD thanks the Japan International Science and Technology Exchange Center (JISTEC) for providing a fellowship and the Grand Agency of the Slovak Academy of Sciences for support. MMD thanks NEDO for providing a fellowship. MRK acknowledges support from the Japan Science and Technology Agency (STA).
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2000/10/15
Y1 - 2000/10/15
N2 - The microstructural features of the (Nd,Eu,Gd)Ba2Cu3O7 (NEG) bulks were studied by optical microscopy in polarized light. The quantitative microstructural data were obtained using the image processing system, Image-Pro Plus. Unlike YBa2Cu3Oy, melt-processed bulks, the NEG bulk superconductors prepared by oxygen-controlled-meltgrowth process do not exhibit macroscopic 211 secondary-phase inhomogeneity due to 211 particle pushing. The lowering of interface energy and increase of melt viscosity are suggested to be responsible for the essential suppression of 211 pushing in NEG melt-grown bulks. This result opens a way to achieve a homogeneous distribution of the current densities in melt-grown bulk superconductors.
AB - The microstructural features of the (Nd,Eu,Gd)Ba2Cu3O7 (NEG) bulks were studied by optical microscopy in polarized light. The quantitative microstructural data were obtained using the image processing system, Image-Pro Plus. Unlike YBa2Cu3Oy, melt-processed bulks, the NEG bulk superconductors prepared by oxygen-controlled-meltgrowth process do not exhibit macroscopic 211 secondary-phase inhomogeneity due to 211 particle pushing. The lowering of interface energy and increase of melt viscosity are suggested to be responsible for the essential suppression of 211 pushing in NEG melt-grown bulks. This result opens a way to achieve a homogeneous distribution of the current densities in melt-grown bulk superconductors.
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U2 - 10.1016/S0921-4534(00)00357-9
DO - 10.1016/S0921-4534(00)00357-9
M3 - Article
AN - SCOPUS:0034300879
SN - 0921-4534
VL - 339
SP - 143
EP - 147
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 3
ER -