High Field ESR in the Two-Dimensional Triangular Lattice Antiferromagnet NiGa2S4

H. Yamaguchi; S. Kimura; M. Hagiwara; Y. Nambu; S. Nakatsuji; Y. Maeno; K. Kindo

doi:10.1103/PhysRevB.78.180404

High Field ESR in the Two-Dimensional Triangular Lattice Antiferromagnet NiGa2S4

Materials Science 2009-11-13 v2 Strongly Correlated Electrons

Authors: H. Yamaguchi , S. Kimura , M. Hagiwara , Y. Nambu , S. Nakatsuji , Y. Maeno , K. Kindo

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Abstract

In this Letter, we report the results of ESR measurements in high magnetic fields up to about 53 T on single crystals of NiGa2S4 to clarify the spin dynamics in more detail. We have found that the dynamics of Z2 vortices affects the temperature dependence of the ESR absorption linewidth and the frequency dependence of the ESR resonance fields at 1.3 K is well explained by a conventional spin wave theory. These results suggest an occurrence of Z2 vortex-induced topological transition.

Keywords

magnetic materials and spin systems

Cite

@article{arxiv.0807.4438,
  title  = {High Field ESR in the Two-Dimensional Triangular Lattice Antiferromagnet NiGa2S4},
  author = {H. Yamaguchi and S. Kimura and M. Hagiwara and Y. Nambu and S. Nakatsuji and Y. Maeno and K. Kindo},
  journal= {arXiv preprint arXiv:0807.4438},
  year   = {2009}
}

Comments

5 pages, 3 figures

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