Linear excitations in the S = 1/2 ferromagnetic chain system cyclohexylammonium-d14 tribromocuprate(II) studied with neutron scattering

G.C. de Vries, E. Frikkee, K. Kakurai, M. Steiner, B. Dorner, K. Kopinga, W.J.M. Jonge, de

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Abstract

The low-energy part of the dispersion relation of the intrachain magnons in the one-dimensional S=(1/2 Heisenberg ferromagnet (C6D11ND3)CuBr3 has been determined with inelastic neutron scattering experiments. For reduced wave vectors qc in the range (0.07)2p/c=qc=(0.25)2p/c and T¿1.5 K, well-defined excitations have been observed. The data can be described by linear spin-wave theory using the known values for the anisotropies and an isotropic part of the intrachain exchange interaction J/kB=65.8±0.8 K, which is in fair agreement with the value deduced recently from single-crystal heat-capacity measurements.
Original languageEnglish
Pages (from-to)7011-7018
Number of pages8
JournalPhysical Review B: Condensed Matter
Volume40
Issue number10
DOIs
Publication statusPublished - 1989

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