Copper and oxygen NMR studies on the magnetic properties of YBa sub 2 Cu sub 3 O sub 7-y
Conference
·
OSTI ID:7021334
Microscopic magnetic properties of the CuO{sub 2} layers in YBa{sub 2}Cu{sub 3}O{sub 7-y} have been investigated from Cu and O NMR experiments on the y{approx equal}0 (T{sub c}=92K) and y=0.37 (T{sub c}=62K) materials. The Knight shift at the planar Cu and the planar oxygen sites are found to be proportional to a common spin susceptibility {chi}{sub s} which depends on temperature and oxygen-content, strongly supporting a single component spin model for the CuO{sub 2} planes. In the y=0.37 material, {chi}{sub s} shows a significant reduction with decreasing temperature in the normal state. The nuclear relaxation rate (1/T{sub 1}) in the y{approx equal}0 material, particularly different behaviors at Cu and O sites, can be accounted for by the hyperfine coupling of Cu and O nuclei to an antiferromagnetically correlated single spin system. Quite different behaviors of 1/T{sub 1} were observed in the y=0.37 material, which might be due to combined effects of antiferromagnetic correlations and a temperature-dependent spin susceptibility. 38 refs., 7 figs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 7021334
- Report Number(s):
- LA-UR-90-112; CONF-8910350--2; ON: DE90007889
- Country of Publication:
- United States
- Language:
- English
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Conference
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Sun Dec 31 23:00:00 EST 1989
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OSTI ID:6899743
Cu and O NMR studies of the magnetic properties of YBa sub 2 Cu sub 3 O sub 6. 63 ( T sub c =62 K)
Journal Article
·
Mon Dec 31 23:00:00 EST 1990
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:6258845
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
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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
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
KNIGHT SHIFT
MAGNETIC PROPERTIES
MAGNETIC RESONANCE
MAGNETIC SUSCEPTIBILITY
NUCLEAR MAGNETIC RESONANCE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RELAXATION
RESONANCE
SPIN-LATTICE RELAXATION
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
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
COPPER COMPOUNDS
COPPER OXIDES
KNIGHT SHIFT
MAGNETIC PROPERTIES
MAGNETIC RESONANCE
MAGNETIC SUSCEPTIBILITY
NUCLEAR MAGNETIC RESONANCE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RELAXATION
RESONANCE
SPIN-LATTICE RELAXATION
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES