Crystal-field excitations and superconductivity in Nd sub 1+ x Ba sub 2 minus x Cu sub 3 O sub 7
- Argonne National Laboratory, Argonne, Illinois 60439 (USA)
The {ital f}-electron excitation spectra of Nd ions in superconducting NdBa{sub 2}Cu{sub 3}O{sub 7} and semiconducting Nd{sub 1.5}Ba{sub 1.5}Cu{sub 3}O{sub 7} have been determined by inelastic neutron scattering. Transitions within the paramagnetic ground-state multiplet due to crystal-field splittings have been observed up to about 120 meV in these materials. The temperature dependence of the width of the low-lying transition at {similar to}21 meV shows significant differences in the superconducting and normal states. Adopting the CF level assignments for HoBa{sub 2}Cu{sub 3}O{sub 7}, we rescaled the CF parameters to account for the larger radial wave functions of Nd{sup 3+} ions and obtained a level scheme for the Nd using the lowest 100 states of the {ital f}{sup 3} configuration. The calculated level structures for REBa{sub 2}Cu{sub 3}O{sub 7} (RE=Nd, Pr, Ho) are in good agreement with neutron and susceptibility measurements. Influence of superconducting ordering on crystal-field transitions in the Nd{sub 1+{ital x}}Ba{sub 2{minus}{ital x}}Cu{sub 3}O{sub 7} system is also discussed.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6948084
- Journal Information:
- Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:9; ISSN 0021-8979; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Phase equilibria, superconductivity, and flux creep in Nd{sub 1+x}Ba{sub 2-x}Cu{sub 3}O{sub 7+{delta}} superconductors
Phase equilibria, superconductivity, and flux creep in Nd sub 1+x Ba sub 2-x Cu sub 3 O sub 7+. delta. superconductors
Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL FIELD
CRYSTALS
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
F STATES
INELASTIC SCATTERING
IONS
NEODYMIUM COMPOUNDS
NEODYMIUM IONS
NEODYMIUM OXIDES
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
RARE EARTH COMPOUNDS
SCATTERING
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS