TY - JOUR
T1 - Epitaxial superconducting Tl0.5Pb0.5Sr1.6Ba0.4Ca2Cu3O9 films on LaAlO3 by thermal spray and post-spray annealing
AU - Li, W.
AU - Wang, D. Z.
AU - Lao, J. Y.
AU - Ren, Z. F.
AU - Wang, J. H.
AU - Paranthaman, M.
AU - Verebelyi, D. T.
AU - Christen, D. K.
PY - 1999/5
Y1 - 1999/5
N2 - A simple, low-cost and easily scalable method - thermal spray followed by post-spray annealing - has been successfully demonstrated for fabricating high-Jc epitaxial superconducting films of Tl0.5Pb0.5Sr1.6Ba0.4Ca2Cu3O9 [(Tl, Pb)-1223]. The process was performed by spraying a stoichiometric solution containing Tl, Pb, Sr, Ba, Ca and Cu nitrates onto LaAlO3 substrates heated to 300-400 °C. Subsequently, the amorphous films were placed inside a silver containment along with two semicircular unfired pellets, and were reacted and crystallized by a thermal anneal at 870 °C in air. X-ray diffraction showed that the films consist mainly of c-axis aligned (Tl, Pb)-1223 phase with a small amount of (Tl, Pb)-1212 phase. X-ray φ-scans revealed very good epitaxial growth. Four-probe transport measurements on a 4 mm wide and 1.2 μm thick film showed a superconducting transition temperature of 106-109 K, with a zero-field critical current of 51 A at 77 K, which corresponds to a critical current density of 1.1×106 A cm-2.
AB - A simple, low-cost and easily scalable method - thermal spray followed by post-spray annealing - has been successfully demonstrated for fabricating high-Jc epitaxial superconducting films of Tl0.5Pb0.5Sr1.6Ba0.4Ca2Cu3O9 [(Tl, Pb)-1223]. The process was performed by spraying a stoichiometric solution containing Tl, Pb, Sr, Ba, Ca and Cu nitrates onto LaAlO3 substrates heated to 300-400 °C. Subsequently, the amorphous films were placed inside a silver containment along with two semicircular unfired pellets, and were reacted and crystallized by a thermal anneal at 870 °C in air. X-ray diffraction showed that the films consist mainly of c-axis aligned (Tl, Pb)-1223 phase with a small amount of (Tl, Pb)-1212 phase. X-ray φ-scans revealed very good epitaxial growth. Four-probe transport measurements on a 4 mm wide and 1.2 μm thick film showed a superconducting transition temperature of 106-109 K, with a zero-field critical current of 51 A at 77 K, which corresponds to a critical current density of 1.1×106 A cm-2.
UR - http://www.scopus.com/inward/record.url?scp=0032631953&partnerID=8YFLogxK
U2 - 10.1088/0953-2048/12/5/101
DO - 10.1088/0953-2048/12/5/101
M3 - Article
AN - SCOPUS:0032631953
SN - 0953-2048
VL - 12
SP - L1-L4
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
IS - 5
ER -