Anomalous temperature evolution of the internal magnetic field distribution in the charge-ordered triangular antiferromagnet AgNiO2

T. Lancaster; S. J. Blundell; P. J. Baker; M. L. Brooks; W. Hayes; F. L. Pratt; R. Coldea; T. Soergel; M. Jansen

doi:10.1103/PhysRevLett.100.017206

Anomalous temperature evolution of the internal magnetic field distribution in the charge-ordered triangular antiferromagnet AgNiO2

Strongly Correlated Electrons 2009-11-13 v1

Authors: T. Lancaster , S. J. Blundell , P. J. Baker , M. L. Brooks , W. Hayes , F. L. Pratt , R. Coldea , T. Soergel , M. Jansen

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Abstract

Zero-field muon-spin relaxation measurements of the frustrated triangular quantum magnet AgNiO2 are consistent with a model of charge disproportionation that has been advanced to explain the structural and magnetic properties of this compound. Below an ordering temperature of T_N=19.9(2) K we observe six distinct muon precession frequencies, due to the magnetic order, which can be accounted for with a model describing the probable muon sites. The precession frequencies show an unusual temperature evolution which is suggestive of the separate evolution of two opposing magnetic sublattices.

Keywords

magnetic structure magnetic materials and spin systems magnetization

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@article{arxiv.0708.0344,
  title  = {Anomalous temperature evolution of the internal magnetic field distribution in the charge-ordered triangular antiferromagnet AgNiO2},
  author = {T. Lancaster and S. J. Blundell and P. J. Baker and M. L. Brooks and W. Hayes and F. L. Pratt and R. Coldea and T. Soergel and M. Jansen},
  journal= {arXiv preprint arXiv:0708.0344},
  year   = {2009}
}

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4 pages, 3 figures

Anomalous temperature evolution of the internal magnetic field distribution in the charge-ordered triangular antiferromagnet AgNiO2

Abstract

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