Metal iodides: novel solution precursors to cuprate superconductors

YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] of (YBCO) was produced through oxidation of a 1:2:3 mixture of YI[sub 3], BaI[sub 2]2H[sub 2]O, and CuI solids. TGA of the iodides revealed low-temperature oxidation below 600[degrees]C of the iodide precursors to the oxides. Thin oriented films of orthorhom...

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Veröffentlicht in:	Chemistry of materials 1992-09, Vol.4 (5), p.984-987
Hauptverfasser:	Baney, Ronald H, Bergstrom, Debora F, Justice, Bruce H
Format:	Artikel
Sprache:	eng
Schlagworte:	360201 - Ceramics, Cermets, & Refractories- Preparation & Fabrication 360207 - Ceramics, Cermets, & Refractories- Superconducting Properties- (1992-) ALKALINE EARTH METAL COMPOUNDS BARIUM COMPOUNDS BARIUM IODIDES BARIUM OXIDES CHALCOGENIDES CHEMICAL ANALYSIS CHEMICAL PREPARATION CHEMICAL REACTIONS COHERENT SCATTERING Condensed matter: structure, mechanical and thermal properties COPPER COMPOUNDS COPPER HALIDES COPPER IODIDES COPPER OXIDES CRYSTAL LATTICES CRYSTAL STRUCTURE DIFFRACTION ELECTRIC CONDUCTIVITY ELECTRICAL PROPERTIES ELECTRON MICROSCOPY Exact sciences and technology GRAVIMETRIC ANALYSIS HALIDES HALOGEN COMPOUNDS HIGH-TC SUPERCONDUCTORS IODIDES IODINE COMPOUNDS MATERIALS SCIENCE MICROSCOPY ORTHORHOMBIC LATTICES OXIDATION OXIDES OXYGEN COMPOUNDS PHYSICAL PROPERTIES Physics QUANTITATIVE CHEMICAL ANALYSIS SCANNING ELECTRON MICROSCOPY SCATTERING Solid surfaces and solid-solid interfaces STRUCTURAL CHEMICAL ANALYSIS SUPERCONDUCTORS Surface and interface dynamics and vibrations Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) SYNTHESIS THERMAL ANALYSIS THERMAL GRAVIMETRIC ANALYSIS Thin film structure and morphology TRANSITION ELEMENT COMPOUNDS X-RAY DIFFRACTION YTTRIUM COMPOUNDS YTTRIUM IODIDES YTTRIUM OXIDES
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Zusammenfassung:	YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] of (YBCO) was produced through oxidation of a 1:2:3 mixture of YI[sub 3], BaI[sub 2]2H[sub 2]O, and CuI solids. TGA of the iodides revealed low-temperature oxidation below 600[degrees]C of the iodide precursors to the oxides. Thin oriented films of orthorhombic YBCO were prepared by multiple spin coating, drying, and oxidizing solutions of the same solids mixture in acetonitrile/ethanol on a SrTiO[sub 3] single crystal. Confirmation of bulk and film structures were made with the aid of X-ray diffractograms, scanning electron and optical microscopy, and resistivity measurements. Typical zero resistance' behavior at 90 K was observed for the iodide precursor derived YBCO.
ISSN:	0897-4756 1520-5002
DOI:	10.1021/cm00023a011