Magnetism in the high-Tc analogue Cs2AgF4 studied with muon-spin relaxation

T. Lancaster; S. J. Blundell; P. J. Baker; W. Hayes; S. R. Giblin; S. E. McLain; F. L. Pratt; Z. Salman; E. A. Jacobs; J. F. C. Turner; T. Barnes

doi:10.1103/PhysRevB.75.220408

Magnetism in the high-Tc analogue Cs2AgF4 studied with muon-spin relaxation

Strongly Correlated Electrons 2007-11-14 v1

Authors: T. Lancaster , S. J. Blundell , P. J. Baker , W. Hayes , S. R. Giblin , S. E. McLain , F. L. Pratt , Z. Salman , E. A. Jacobs , J. F. C. Turner , T. Barnes

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Abstract

We present the results of a muon-spin relaxation study of the high-Tc analogue material Cs2AgF4. We find unambiguous evidence for magnetic order, intrinsic to the material, below T_C=13.95(3) K. The ratio of inter- to intraplane coupling is estimated to be |J'/J|=1.9 x 10^-2, while fits of the temperature dependence of the order parameter reveal a critical exponent beta=0.292(3), implying an intermediate character between pure two- and three- dimensional magnetism in the critical regime. Above T_C we observe a signal characteristic of dipolar interactions due to linear F-mu-F bonds, allowing the muon stopping sites in this compound to be characterized.

Keywords

muon-spin relaxation Cs2AgF4 magnetic order high-Tc analogue critical exponent dipolar interactions

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@article{arxiv.0704.0604,
  title  = {Magnetism in the high-Tc analogue Cs2AgF4 studied with muon-spin relaxation},
  author = {T. Lancaster and S. J. Blundell and P. J. Baker and W. Hayes and S. R. Giblin and S. E. McLain and F. L. Pratt and Z. Salman and E. A. Jacobs and J. F. C. Turner and T. Barnes},
  journal= {arXiv preprint arXiv:0704.0604},
  year   = {2007}
}

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4 pages, 3 figures

Magnetism in the high-Tc analogue Cs2AgF4 studied with muon-spin relaxation

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