TY - JOUR
T1 - Microstructures and superconducting properties of single domain (Sm0.5,Eu0.5)Ba2Cu3 O7-δ superconductors fabricated in air
AU - Hu, A.
AU - Sakai, N.
AU - Ogasawara, K.
AU - Murakami, M.
N1 - Funding Information:
This work is supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications under the New Sunshine Program administered by the Agency of Industrial Science and Technology (AIST) of the Ministry of International Trade and Industry (MITI) of Japan. One of author (AH) is grateful to the NEDO for providing the financial support.
Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2002/1/15
Y1 - 2002/1/15
N2 - Single-domain (Sm0.5,Eu0.5)Ba2Cu3 O7-δ grains were obtained via modified melt processing in air using NdBa2Cu3O7-δ seeds. The facet growth front was observed in the a/b growth direction and the stepwise growth front in the c growth direction. A series of crystal defects: dislocations, twin boundaries and local chemical variations between rare earth and Ba were revealed by transmission electron microscopy and energy dispersive spectrum analysis. In addition, a slightly higher concentration of Sm than Eu was revealed in the matrix. A high Tc value up to 94.5 K and enhanced Jc values over a wide field range at 77 K were obtained after Ar post-annealing. A pellet of diameter 16 mm trapped 0.45 T field at 77 K.
AB - Single-domain (Sm0.5,Eu0.5)Ba2Cu3 O7-δ grains were obtained via modified melt processing in air using NdBa2Cu3O7-δ seeds. The facet growth front was observed in the a/b growth direction and the stepwise growth front in the c growth direction. A series of crystal defects: dislocations, twin boundaries and local chemical variations between rare earth and Ba were revealed by transmission electron microscopy and energy dispersive spectrum analysis. In addition, a slightly higher concentration of Sm than Eu was revealed in the matrix. A high Tc value up to 94.5 K and enhanced Jc values over a wide field range at 77 K were obtained after Ar post-annealing. A pellet of diameter 16 mm trapped 0.45 T field at 77 K.
KW - (Sm,Eu)BaCu O
KW - Melt processing
KW - Microstructure defect
KW - Superconducting properties
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U2 - 10.1016/S0921-4534(01)00885-1
DO - 10.1016/S0921-4534(01)00885-1
M3 - Article
AN - SCOPUS:0037079756
VL - 366
SP - 157
EP - 163
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 3
ER -