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Magnetic isolation of Gd in superconducting GdBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
; ; ; ; ; ;
The electronic and magnetic structures of Gd in superconducting GdBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ have been probed using the 86.5-keV Moessbauer resonance transition in /sup 155/Gd. The values of the hyperfine interaction parameters provide direct evidence for an absence of conduction electrons at the Gd site in this lattice and hence no exchange coupling of the Gd ion with the conduction electrons. The results explain why the superconducting transition temperature of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ is not suppressed by the substitution of Y atoms by magnetic Gd atoms.
Research Organization:
Materials Science and Chemistry Divisions, Argonne National Laboratory, Argonne, Illinois 60439
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
5530503
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:16; ISSN PRBMD
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
EVEN-ODD NUCLEI
GADOLINIUM 155
GADOLINIUM COMPOUNDS
GADOLINIUM ISOTOPES
GADOLINIUM OXIDES
INTERMEDIATE MASS NUCLEI
ISOTOPES
LOW TEMPERATURE
MAGNETIC PROPERTIES
MATERIALS
MOESSBAUER EFFECT
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SCATTERING
SINTERED MATERIALS
SPECIFIC HEAT
STABLE ISOTOPES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES