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Subsolidus phase relations of Nd/sub 2/O/sub 3/-BaO-CuO system and superconductivity of Nd/sub 1+chi/Ba/sub 2-chi/Cu/sub 3/O/sub y/ (0 le chi le 1)

Journal Article · · Modern Physics Letters B; (USA)
OSTI ID:5658104
; ; ; ;  [1]
  1. Institute of Physics, Chinese Academy of Science, Beijing (CN)
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The 903{sup 0}C subsolidus phase relationship of Nd/sub 2/O/sub 3/0-BaO-CuO system (CuO-rich region) have been determined by means of X-ray diffraction method. The superconductivity of Nd/sub 1+x/Ba/sub 2-x/Cu/sub 3/O/sub y/ have been studied. These compounds are superconducting provided they have orthorhombic distorted perovskite structures. The results show that the superconductivity mechanism is related to the Cu-O low dimensional network which may be dependent on the orthorhombic distorted structure, oxygen content and distribution. The result also shows that the amorphous content will influence their superconductivity; but it seems independence on the (Ba,Nd) order-disorder arrangements. Unlike in the other systems, the best superconducting compound in this system does not limit to the ideal (123) composition.
OSTI ID:
5658104
Journal Information:
Modern Physics Letters B; (USA), Journal Name: Modern Physics Letters B; (USA) Vol. 2:9; ISSN 0217-9849; ISSN MPLBE
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
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
MINERALS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NONMETALS
ORDER-DISORDER TRANSFORMATIONS
ORTHORHOMBIC LATTICES
OXIDE MINERALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PEROVSKITE
PEROVSKITES
PHASE STUDIES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POINT DEFECTS
RARE EARTH COMPOUNDS
SCATTERING
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
VACANCIES
X-RAY DIFFRACTION