Abstract
Inelastic neutron-scattering measurements were performed on single-crystal Co3 V2 O8 wherein magnetic cobalt ions reside on distinct spine and cross-tie sites within kagome staircase planes. This system displays a rich magnetic phase diagram which culminates in a ferromagnetic ground state below TC ∼6 K. We have studied the low-lying magnetic excitations in this phase within the kagome plane. Despite the complexity of the system at higher temperatures, linear spin-wave theory describes most of the quantitative detail of the inelastic neutron measurements. Our results show two spin-wave branches, the higher energy of which displays finite spin-wave lifetimes well below TC, and that, surprisingly, the magnetic exchange coupling between Co moments on the spine sites is negligible.
Original language | English |
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Article number | 024417 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 79 |
Issue number | 2 |
DOIs | |
Publication status | Published - 5 Jan 2009 |
Externally published | Yes |