Two-dimensional spin fluctuations of Ho3+ in HoBa2Cu3O7
Creators
- 1. and Laboratory for Neutron Scattering, Eidgenoessische Technische Hochschule and Paul Scherrer Institute, CH-5232 Villigen PSI (Switzerland)
- 2. Swiss Light Source Project, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerl
- 3. Institut Laue Langevin, 156 X, F-38042 Grenoble CEDEX (France)
Description
Neutron diffraction and inelastic neutron scattering results on HoBa2Cu3O7 are presented. In the neutron diffraction experiments two-dimensional (2D) short-range order has been observed in the Ho3+ sublattice at 1.6 K, which is at a temperature far above the hyperfine-induced ordering temperature TN=190 mK. A strong enhancement of the effective susceptibility (including the hyperfine interaction) compared with a Curie-Weiss susceptibility is found above 400 mK. This enhancement explains why short-range ordering of the Ho3+ spins with an in-plane correlation length of 13 A are detectable at these temperatures. In addition, a mean-field shift of the lowest lying crystal-field transition was observed between 9 and 300 mK, which is well described within our formalism. The anisotropic line shape of this transition could be understood by a Gaussian field distribution on the Ho3+ site, originated in the dynamic 2D short-range ordering. These results are in good agreement with muon spin rotation results. copyright 1996 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 54
- Journal Issue
- 10
- Journal Page Range
- p. 7279-7283.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 28007317
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; CRYSTAL FIELD; HIGH-TC SUPERCONDUCTORS; HOLMIUM IONS; HOLMIUM OXIDES; INELASTIC SCATTERING; MAGNETIC PROPERTIES; NEUTRON DIFFRACTION; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; COPPER COMPOUNDS; DIFFRACTION; HOLMIUM COMPOUNDS; IONS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SCATTERING; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS