Temperature effects on multi-particle scattering in a gapped quantum magnet

TitleTemperature effects on multi-particle scattering in a gapped quantum magnet
Publication TypeJournal Article
Year of Publication2007
AuthorsNotbohm S, Tennant DA, Lake B, Canfield PC, Fielden J, Kogerler P, Mikeska HJ, Luckmann C, Telling MTF
Journal TitleJournal of Magnetism and Magnetic Materials
Date PublishedMar
Type of ArticleProceedings Paper
ISBN Number0304-8853
Accession NumberISI:000247618700233
Keywordschain, dynamics, neutron scattering, quantum magnet

We report measurements of the temperature effects on the dimerized antiferromagnetic chain material, copper nitrate Cu(NO3)(2) (.) 2.5D(2)O. Using inelastic neutron scattering we have measured the temperature dependence of the one- and two-magnon excitation spectra as well as the temperature induced one-magnon intra-band scattering in a single crystal. Comparison is made with numerical evaluations of thermal averages based on the calculation for a chain of 16 spins. (c) 2006 Elsevier B.V. All rights reserved.

Alternate JournalJ. Magn. Magn. Mater.