Absence of metallic character at certain Cu sites in YBa/sub 2/Cu/sub 3/O/sub 6. 7/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We report /sup 63/Cu nuclear-quadrupolar-resonance spectra and nuclear-spin relaxation data for the oxygen-deficient phase YBa/sub 2/Cu/sub 3/O/sub 6.7/. Compared with YBa/sub 2/Cu/sub 3/O/sub 7.0/, the spin-lattice relaxation rates are reduced by more than three orders of magnitude for a class of sites identified as nonmetallic Cu(1) ''chain'' sites with twofold oxygen coordination. Generation of these 3d/sup 10/ Cu/sup +/ sites by ordering of oxygen vacancies onto ''empty'' chains increases the carrier concentration and may help maintain the observed 60-K plateau in the variation of T/sub c/ with oxygen concentration.
- Research Organization:
- ATandT Bell Laboratories, 600 Mountain Avenue, Murray Hill, New Jersey 07974
- OSTI ID:
- 6552012
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:1; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cu spin dynamics and superconducting precursor effects in planes above T/sub c/ in YBa/sub 2/Cu/sub 3/O/sub 6. 7/
NMR evidence for localized spins on Cu(2) sites from Cu NMR in YBa/sub 2/Cu/sub 3/O/sub 7/ and YBa/sub 2/Cu/sub 3/O/sub 6. 75/ single crystals
Single-spin fluid, spin gap, and [ital d]-wave pairing in YBa[sub 2]Cu[sub 4]O[sub 8]: A NMR and NQR study
Journal Article
·
Sun Mar 05 23:00:00 EST 1989
· Phys. Rev. Lett.; (United States)
·
OSTI ID:6359877
NMR evidence for localized spins on Cu(2) sites from Cu NMR in YBa/sub 2/Cu/sub 3/O/sub 7/ and YBa/sub 2/Cu/sub 3/O/sub 6. 75/ single crystals
Journal Article
·
Fri Mar 31 23:00:00 EST 1989
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6407534
Single-spin fluid, spin gap, and [ital d]-wave pairing in YBa[sub 2]Cu[sub 4]O[sub 8]: A NMR and NQR study
Journal Article
·
Thu Sep 01 00:00:00 EDT 1994
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:6669129
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER 63
COPPER COMPOUNDS
COPPER ISOTOPES
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
INTERMEDIATE MASS NUCLEI
ISOTOPES
LOW TEMPERATURE
NUCLEAR QUADRUPOLE RESONANCE
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
POINT DEFECTS
RELAXATION
RESONANCE
SPIN-LATTICE RELAXATION
STABLE ISOTOPES
TRANSITION ELEMENT COMPOUNDS
VACANCIES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER 63
COPPER COMPOUNDS
COPPER ISOTOPES
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
INTERMEDIATE MASS NUCLEI
ISOTOPES
LOW TEMPERATURE
NUCLEAR QUADRUPOLE RESONANCE
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
POINT DEFECTS
RELAXATION
RESONANCE
SPIN-LATTICE RELAXATION
STABLE ISOTOPES
TRANSITION ELEMENT COMPOUNDS
VACANCIES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES