Abstract
Linear-chain nickelates with the composition (Formula presented) ((Formula presented) and (Formula presented)) are studied in a series of neutron-scattering experiments. Powder diffraction is used to determine the temperature dependence of the magnetic structure in all four systems. Single-crystal inelastic neutron scattering is employed to investigate the temperature dependence of the Haldane-gap excitations and low-energy spin waves in the (Formula presented) compound (Formula presented) The results of these experiments are discussed in the context of the “Haldane chain in a staggered field” model for (Formula presented) systems, and quantitative agreement with theory is obtained.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 14424-14435 |
| Number of pages | 12 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 58 |
| Issue number | 21 |
| DOIs | |
| State | Published - 1998 |
| Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics