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 language | English |
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| Pages (from-to) | 7011-7018 |
| Number of pages | 8 |
| Journal | Physical Review B: Condensed Matter |
| Volume | 40 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 1989 |