Neutron crystal-field spectroscopy and magnetic properties of DyBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.2226· OSTI ID:6552493

Allenspach, P; Furrer, A; Hulliger, F

Inelastic neutron scattering has been employed to study the crystalline electric-field (CEF) interaction in the high-T/sub c/ superconductor DyBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/. The CEF at the Dy site splits the 16-fold degeneracy of the ground-state J multiplet into eight doublet states. From the observed energy spectra we have been able to assign the four lowest excited CEF states which provided sufficient information to derive the leading CEF parameters. The results are used to predict both the direction and the size of the ordered magnetic moment in zero field, the high-field magnetization, and the Schottky anomaly of the heat capacity of DyBa/sub 2/Cu/sub 3/O/sub 7/, which yields reasonable agreement with the experimental data. The character of the CEF level scheme supports the application of the two-dimensional Ising model to describe the magnetic ordering of the Dy moments. From the temperature dependence of the quasielastic linewidth we conclude that the conduction electron density is negligibly small at the Dy site below T/sub c/.

• Research Organization: Laboratorium fuer Neutronenstreuung, Eidgenoessische Technische Hochschule Zuerich, CH-5303 Wuerenligen, Switzerland
• OSTI ID: 6552493
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:4; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL FIELD
CRYSTAL MODELS
DIFFRACTION
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
ENERGY LEVELS
EXCITED STATES
INELASTIC SCATTERING
ISING MODEL
LINE WIDTHS
MAGNETIC MOMENTS
MAGNETIZATION
MATHEMATICAL MODELS
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SPECIFIC HEAT
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TWO-DIMENSIONAL CALCULATIONS