Thermodynamic and magnetic properties of the layered triangular magnet NaNiO2

P. J. Baker; T. Lancaster; S. J. Blundell; M. L. Brooks; W. Hayes; D. Prabhakaran; F. L. Pratt

doi:10.1103/PhysRevB.72.104414

Thermodynamic and magnetic properties of the layered triangular magnet NaNiO2

Strongly Correlated Electrons 2010-07-08 v1

Authors: P. J. Baker , T. Lancaster , S. J. Blundell , M. L. Brooks , W. Hayes , D. Prabhakaran , F. L. Pratt

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Abstract

We report muon-spin rotation, heat capacity, magnetization, and ac magnetic susceptibility measurements of the layered spin-1/2 antiferromagnet NaNiO2. These show the onset of long-range magnetic order below T_N = 19.5K. Rapid muon depolarization persisting to about 5K above T_N is consistent with the presence of short-range magnetic order. The temperature and frequency dependence of the ac susceptibility suggests that magnetic clusters persist above 25K in the paramagnetic state and that their volume fraction decreases with increasing temperature. A frequency dependent peak in the ac magnetic susceptibility at T_sf = 3K is observed, consistent with a slowing of spin fluctuations at this temperature. A partial magnetic phase diagram is deduced.

Keywords

NaNiO2 layered triangular magnet antiferromagnet muon-spin rotation magnetic order ac susceptibility

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@article{arxiv.cond-mat/0506141,
  title  = {Thermodynamic and magnetic properties of the layered triangular magnet NaNiO2},
  author = {P. J. Baker and T. Lancaster and S. J. Blundell and M. L. Brooks and W. Hayes and D. Prabhakaran and F. L. Pratt},
  journal= {arXiv preprint arXiv:cond-mat/0506141},
  year   = {2010}
}

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4 pages, 4 figures

Thermodynamic and magnetic properties of the layered triangular magnet NaNiO2

Abstract

Keywords

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