Spin dynamics in the low-dimensional magnet TiOCl

D. V. Zakharov; J. Deisenhofer; H. -A. Krug von Nidda; P. Lunkenheimer; J. Hemberger; M. Hoinkis; M. Klemm; M. Sing; R. Claessen; M. V. Eremin; S. Horn; A. Loidl

doi:10.1103/PhysRevB.73.094452

Spin dynamics in the low-dimensional magnet TiOCl

Strongly Correlated Electrons 2009-11-11 v1

Authors: D. V. Zakharov , J. Deisenhofer , H. -A. Krug von Nidda , P. Lunkenheimer , J. Hemberger , M. Hoinkis , M. Klemm , M. Sing , R. Claessen , M. V. Eremin , S. Horn , A. Loidl

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Abstract

We present detailed ESR investigations on single crystals of the low-dimensional quantum magnet TiOCl. The anisotropy of the g-factor indicates a stable orbital configuration below room temperature, and allows to estimate the energy of the first excited state as 0.3(1) eV ruling out a possible degeneracy of the orbital ground state. Moreover, we discuss the possible spin relaxation mechanisms in TiOCl and analyze the angular and temperature dependence of the linewidth up to 250 K in terms of anisotropic exchange interactions. Towards higher temperatures an exponential increase of the linewidth is observed, indicating an additional relaxation mechanism.

Keywords

magnetic materials and spin systems magnetic anisotropy frustrated magnetism

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@article{arxiv.cond-mat/0602678,
  title  = {Spin dynamics in the low-dimensional magnet TiOCl},
  author = {D. V. Zakharov and J. Deisenhofer and H. -A. Krug von Nidda and P. Lunkenheimer and J. Hemberger and M. Hoinkis and M. Klemm and M. Sing and R. Claessen and M. V. Eremin and S. Horn and A. Loidl},
  journal= {arXiv preprint arXiv:cond-mat/0602678},
  year   = {2009}
}

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10 pages, 8 figures; accepted for publication in Phys. Rev. B

Spin dynamics in the low-dimensional magnet TiOCl

Abstract

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