TY - JOUR
T1 - Studies of the La1 + xBa2 - XCu3Oz prepared from highly homogeneous precursors
AU - Petrykin, V.
AU - Karpov, A.
AU - Poltavec, V.
AU - Lee, S.
AU - Kakihana, M.
AU - Tretyakov, Yu
N1 - Funding Information:
Valery Petrykin is grateful to the Ministry of Culture and Education of Japan (Monbusho) for providing him with a scholarship in 1997, which partially supported his research. Alexei Karpov would like to thank the Soros Foundation for supporting his research activity.
PY - 1997
Y1 - 1997
N2 - Single phase materials of La1 + xBa2 - xCu3Oz with x = 0.0, . . . ,0.98, were synthesized from highly homogeneous precursors, prepared by spray-drying or the polymerized complex method. These samples were characterized using X-ray diffraction (XRD), Raman spectroscopy and AC susceptibility measurements. The effects of composition, processing time, temperature and oxygen partial pressure, on the formation and decomposition of La1 + xBa2 - xCu3Oz prepared by different methods, were investigated. We found that: Tc gradually decreased with the increase of La content; orthorhombic distortions appear at x < 0.25 and x > 0.7; and single phase stoichiometric La-123 ceramic samples, obtained at low oxygen partial pressure and quenched, decomposed into La-123ss (x = 0.2) and BaCuO2 after annealing at a rather low temperature, below 500°C.
AB - Single phase materials of La1 + xBa2 - xCu3Oz with x = 0.0, . . . ,0.98, were synthesized from highly homogeneous precursors, prepared by spray-drying or the polymerized complex method. These samples were characterized using X-ray diffraction (XRD), Raman spectroscopy and AC susceptibility measurements. The effects of composition, processing time, temperature and oxygen partial pressure, on the formation and decomposition of La1 + xBa2 - xCu3Oz prepared by different methods, were investigated. We found that: Tc gradually decreased with the increase of La content; orthorhombic distortions appear at x < 0.25 and x > 0.7; and single phase stoichiometric La-123 ceramic samples, obtained at low oxygen partial pressure and quenched, decomposed into La-123ss (x = 0.2) and BaCuO2 after annealing at a rather low temperature, below 500°C.
UR - http://www.scopus.com/inward/record.url?scp=0030622484&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030622484&partnerID=8YFLogxK
U2 - 10.1016/S0964-1807(98)00033-7
DO - 10.1016/S0964-1807(98)00033-7
M3 - Article
AN - SCOPUS:0030622484
VL - 5
SP - 47
EP - 52
JO - Applied Superconductivity
JF - Applied Superconductivity
SN - 0964-1807
IS - 1-6
ER -