Spin waves in the ferromagnetic ground state of the kagome staircase system Co3V2O8

M. Ramazanoglu*, C. P. Adams, J. P. Clancy, A. J. Berlinsky, Z. Yamani, R. Szymczak, H. Szymczak, J. Fink-Finowicki, B. D. Gaulin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

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 languageEnglish
Article number024417
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number2
DOIs
Publication statusPublished - 5 Jan 2009
Externally publishedYes

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