Published May 1, 2000
| Version v1
Journal article
Role of single-ion excitations in the mixed-spin quasi-one-dimensional quantum antiferromagnet Nd2BaNiO5
- 1. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
- 2. Department of Physics, Aoyama-Gakuin University, 6-16-1 Chitosedai, Setagaya-ku, Tokyo 157 Japan (Japan)
- 3. Universite de Geneve DPMC 24, quai Ernest Ansermet 1211, Geneve 4, (Switzerland)
- 4. Oak Ridge National Laboratory, Building 7692, MS 6393, P.O. Box 2008, Oak Ridge, Tennessee 37831 (United States)
- 5. Department of Physics, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, (Japan)
Description
Inelastic neutron scattering experiments on Nd2BaNiO5 single crystals and powder samples are used to study the dynamic coupling of one-dimensional Haldane-gap excitations in the S=1 Ni2+-chains to local crystal-field transitions, associated with the rare earth ions. Substantial interference between the two types of excitations is observed even in the one-dimensional paramagnetic phase. Despite that, the results provide solid justification for the previously proposed ''static staggered field'' model for R2BaNiO5 nickelates. The observed behavior is qualitatively explained by a simple chain-random-phase-approximation model. (c) 2000 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter and Materials Physics
- Journal Volume
- 61
- Journal Issue
- 17
- Journal Page Range
- p. 11601-11612
- ISSN
- 1098-0121
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 32059981
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANTIFERROMAGNETIC MATERIALS; BARIUM OXIDES; CRYSTAL FIELD; INELASTIC SCATTERING; MAGNETIC PROPERTIES; NEUTRON DIFFRACTION; NICKEL OXIDES; NIOBIUM OXIDES; RANDOM PHASE APPROXIMATION; THEORETICAL DATA
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; DATA; DIFFRACTION; INFORMATION; MAGNETIC MATERIALS; MATERIALS; NICKEL COMPOUNDS; NIOBIUM COMPOUNDS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REFRACTORY METAL COMPOUNDS; SCATTERING; TRANSITION ELEMENT COMPOUNDS
- Proposed descriptors and Free-text terms
- RPA calculations; spin dynamics