TY - JOUR
T1 - Influence of coating solution composition on REBa2Cu 3Oy(RE=Gd and Sm,Eu,Gd) films fabricated by fluorine-free metalorganic deposition
AU - Nakamura, T.
AU - Kita, R.
AU - Kawabata, S.
AU - Miura, O.
AU - Ichinose, A.
AU - Matsumoto, K.
AU - Yoshida, Y.
AU - Mukaida, M.
AU - Horii, S.
PY - 2010/5/20
Y1 - 2010/5/20
N2 - GdBa2Cu3Oy (GdBCO) and Sm 0.33Eu0.33Gd0.33Ba2Cu 3Oy (SEG) films were prepared by metalorganic deposition (MOD) using two fluorine-free solutions: A metal 2-ethylhexanate (2-EH) and a complex solution (CS) consisting of metal 2-EH and metal-naphthenate. We investigated the effects of these new fluorine-free solutions, and their potential use in the fabrication of several REBCO (RE: rare earth) materials. The crystal growth, surface morphology, and superconducting properties of films prepared on single-crystal LaAlO3 substrates at low oxygen partial pressure strongly depended upon the coating solution used. Films prepared using 2-EH exhibited improved thermal stability of the superconducting phase during heat treatment. On the other hand, films prepared by CS had a flat superconducting matrix, with a roughness of several tens of nm and large precipitates 23 μm in diameter. In addition, the CS films had a higher critical temperature (91.2 K) than the 2-EH film. The zero-field critical current density at 77.3 K was 0.19 MA/cm2 for 2-EH films, and 0.61 MA/cm2 for CS films.
AB - GdBa2Cu3Oy (GdBCO) and Sm 0.33Eu0.33Gd0.33Ba2Cu 3Oy (SEG) films were prepared by metalorganic deposition (MOD) using two fluorine-free solutions: A metal 2-ethylhexanate (2-EH) and a complex solution (CS) consisting of metal 2-EH and metal-naphthenate. We investigated the effects of these new fluorine-free solutions, and their potential use in the fabrication of several REBCO (RE: rare earth) materials. The crystal growth, surface morphology, and superconducting properties of films prepared on single-crystal LaAlO3 substrates at low oxygen partial pressure strongly depended upon the coating solution used. Films prepared using 2-EH exhibited improved thermal stability of the superconducting phase during heat treatment. On the other hand, films prepared by CS had a flat superconducting matrix, with a roughness of several tens of nm and large precipitates 23 μm in diameter. In addition, the CS films had a higher critical temperature (91.2 K) than the 2-EH film. The zero-field critical current density at 77.3 K was 0.19 MA/cm2 for 2-EH films, and 0.61 MA/cm2 for CS films.
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U2 - 10.1142/S0217984910023189
DO - 10.1142/S0217984910023189
M3 - Article
AN - SCOPUS:77952540414
SN - 0217-9849
VL - 24
SP - 1165
EP - 1172
JO - Modern Physics Letters B
JF - Modern Physics Letters B
IS - 12
ER -