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Properties of V/sub 1-x/Cu/sub x/O/sub 2/ solid solutions (0 less than or equal to x less than or equal to 0. 04)

Journal Article · · Inorg. Mater. (Engl. Transl.); (United States)
OSTI ID:6051608
; ; ; ;
V/sub 1-x/Cu/sub x/O/sub 2/ (0 less than or equal to x less than or equal to 0.04) solid solutions have been made and have been shown to be isostructural with pure vanadium dioxide for x less than or equal to 0.02. There is a semiconductor-metal transition in them, and the copper ions are redistributed for x > 0.02. Copper reduces the semiconductor-metal transition temperature and stabilizes the intermediate insulating phase. Susceptibility and voltammetry indicate that the copper in V/sub 1-x/Cu/sub x/O/sub 2/ indicates that paramagnetic centers are formed by breakage of some of the V/sup 4 +/ - V/sup 4 +/ bonds, with 4V/sup 4 +/ ..-->.. 3V/sup 5 +/ + Cu/sup +/ charge compensation. The number of paramagnetic centers is proportional to the copper concentration for x less than or equal to 0.02.
Research Organization:
Ural Scientific Center (USSR)
OSTI ID:
6051608
Journal Information:
Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 23:10; ISSN INOMA
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DOPING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALS
CURIE-WEISS LAW
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
ELEMENTS
IONIC CRYSTALS
LATTICE PARAMETERS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MATERIALS
METALLURGICAL EFFECTS
METALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PARAMAGNETISM
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SEMICONDUCTOR MATERIALS
SOLID SOLUTIONS
SOLUTIONS
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VALENCE
VANADIUM COMPOUNDS
VANADIUM OXIDES
VOLTAMETRY