Spin Waves in the Ferromagnetic Ground State of the Kagome Staircase System Co$_{3}$V$_{2}$O$_{8}$

ORAL

Abstract

We have performed inelastic neutron scattering measurements on a single crystal sample of cobalt vanadate, Co$_{3}$V$_{2}$O$_{8}$ (CVO). The magnetic Co ions in CVO decorate a stacked, Kagome staircase crystal structure, and the system displays a complex sequence of ordered magnetic phases, culminating in a ferromagnetic phase at low $T$ [1,2]. We studied the spin wave dispersion relations and intensities within the Kagome planes and in the low temperature ferromagnetic phase which the system enters below $T_{c}\sim $6 K. Linear spin wave theory can model the qualitative features and much quantitative detail of these inelastic neutron measurements. These results show strongly anisotropic exchange interactions within this plane, and interesting finite lifetimes to the spin waves well below $T_{c}$. \newline [1] R. Szymczak et. al. PRB 73, 094425, (2006) \newline [2] Y. Chen et. al. PRB 74,014430, (2006)

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Authors

  • Mehmet Ramazanoglu

    Dept. of Physics and Astronomy, McMaster Univ., Hamilton, ON, Canada

  • J. Pat Clancy

    Dept. of Physics and Astronomy, McMaster Univ., Hamilton, ON, Canada

  • John Berlinsky

    Dept. of Physics and Astronomy, McMaster Univ., Hamilton, ON, Canada, McMaster University, Department of Physics and Astronomy, McMaster University, Hamilton, ON, Canada

  • Bruce D. Gaulin

    Dept. of Physics and Astronomy, McMaster Univ., Hamilton, ON, Canada

  • Carl Adams

    Dept. of Physics, St. Francis Xavier Univ., Antigonish, NS, Canada, St. Francis Xavier University

  • Zahra Yamani

    NRC,CNBC,Chalk River, ON, Canada

  • Ritta Szymczak

    Inst. of Physics, Polish Academy of Sciences, Poland

  • Henryk Szymczak

    Inst. of Physics, Polish Academy of Sciences, Poland

  • Jan Fink-Finowicki

    Inst. of Physics, Polish Academy of Sciences, Poland