TY - JOUR
T1 - Improvement of the superconducting properties in (Nd, Sm, Eu)-Ba-Cu-O using melt-quenched precursors
AU - Muralidhar, M.
AU - Murakami, M.
PY - 1998/12/1
Y1 - 1998/12/1
N2 - We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1% O2-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE1+xBa2-xCu3Oy precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset Tc exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.
AB - We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1% O2-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE1+xBa2-xCu3Oy precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset Tc exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.
KW - (Nd, Sm, Eu)-Ba-Cu-O
KW - Critical current density
KW - Critical temperature
KW - Melt process
KW - Melt quenching
KW - Peak effect
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U2 - 10.1016/S0921-4534(98)00592-9
DO - 10.1016/S0921-4534(98)00592-9
M3 - Article
AN - SCOPUS:0032291323
VL - 309
SP - 39
EP - 42
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -