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An enhancement in structural and superconducting properties of Bi2212 epitaxial thin films grown by the Pechini sol–gel method
Author(s) -
Lu Xiaoming,
Wang Tianlin,
Zhang Yaming,
Shahzad M. Babar,
Qi Yang
Publication year - 2013
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889812051175
Subject(s) - crystallinity , materials science , thin film , sol gel , epitaxy , sintering , spin coating , phase (matter) , superconductivity , chemical engineering , analytical chemistry (journal) , composite material , nanotechnology , condensed matter physics , layer (electronics) , chemistry , chromatography , organic chemistry , physics , engineering
Bi 2 Sr 2 CaCu 2 O 8+δ (Bi2212) superconducting thin films were prepared by the Pechini sol–gel method using nitrates as reactants. The precursor sol was deposited on SrTiO 3 (001) single‐crystal substrates via the spin‐coating method, and the results revealed the lowering of the Bi2212 phase‐transition temperature; meanwhile the sintering time was significantly reduced. According to this investigation, the phase purity and crystallinity of Bi2212 thin films were obviously improved owing to the stable gel mechanism; the T c,onset transition temperature value of the pure c ‐axis Bi2212 thin films rose to about 95 K.