Magnetic excitations of the dilute one-dimensional magnet CsMnxMg1−xBr3
- 15 March 1984
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 55 (6) , 1877-1879
- https://doi.org/10.1063/1.333506
Abstract
The inelastic neutron scattering technique was used to measure the magnetic excitation spectrum of the dilute one‐dimensional magnet CsMnxMg1−xBr3 in the low‐concentration limit (x=0.14, 0.28). The observed energy spectra exhibit a series of well‐resolved peaks which are interpreted in terms of transitions within clusters of dimers and trimers of Mn2+ ions arranged along the c axis. The observed exchange splittings are directly related to the exchange interactions. In the Heisenberg picture the nearest‐neighbor and next‐nearest‐neighbor exchange parameters are determined to be J=−0.89±0.02 meV and J′=−0.04±0.02 meV, respectively. Spin‐wave theory turns out to be inadequate for studying the spin dynamics of small clusters.This publication has 4 references indexed in Scilit:
- Spin wave theory of dilute one-dimensional magnetsJournal of Physics C: Solid State Physics, 1983
- Neutron inelastic scattering from isolated clusters of magnetic ionsJournal of Magnetism and Magnetic Materials, 1979
- Excitations of isolated clusters of magnetic ionsJournal of Applied Physics, 1978
- Inelastic neutron scattering study of the quasi-1d heisenberg antiferromagnet CsMnBr3Journal of Magnetism and Magnetic Materials, 1977