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Processing and Characterization of Thin Films of the One‐Layer Phase in the Bi‐Sr‐Ca‐Cu‐O System: Ca Solubility
Author(s) -
Golden Steve J.,
Lange Fred F.,
Vaidya Kaushik J.,
Bloomer Tamara E.
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb06927.x
Subject(s) - solubility , solidus , analytical chemistry (journal) , phase (matter) , ternary operation , thin film , ternary numeral system , chemistry , doping , mineralogy , materials science , organic chemistry , nanotechnology , optoelectronics , alloy , computer science , programming language
Thin films in the Bi‐Sr‐Ca‐Cu‐O system have been synthesized from liquid ethyl hexanoate precursors by spin pyrolysis. The extension of the ternary one‐layer phase field into the quaternary system has been determined through the replacement of Sr by Ca in single‐phase, c ‐axis oriented thin films. A significant Ca solubility in the one‐layer phase was found, the maximum being around 0.4 per 1 Cu. All onelayer compositions were excess in Bi and deficient in (Sr + Ca) relative to the ideal composition and showed over all cation deficiency. The c lattice parameter and solidus temperature were found to vary systematically with composition. The interpretation of the Ca solubility results in terms of Ca doping of the cation‐deficient “Sr”sites and implications regarding the high‐ T c Cu‐layer phases in the system are discussed.