Bulk antiferromagnetism in $\bf Na_{0.82}CoO_2$ single crystals

S. Bayrakci; C. Bernhard; D. P. Chen; B. Keimer; R. K. Kremer; P. Lemmens; C. T. Lin; C. Niedermayer; J. Strempfer

doi:10.1103/PhysRevB.69.100410

Bulk antiferromagnetism in $\bf Na_{0.82}CoO_2$ single crystals

Strongly Correlated Electrons 2009-11-10 v2 Superconductivity

Authors: S. Bayrakci , C. Bernhard , D. P. Chen , B. Keimer , R. K. Kremer , P. Lemmens , C. T. Lin , C. Niedermayer , J. Strempfer

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Abstract

Susceptibility, specific heat, and muon spin rotation measurements on high-quality single crystals of $\rm Na_{0.82}CoO_2$ have revealed bulk antiferromagnetism with N\'{e}el temperature $\rm T_N = 19.8 \pm 0.1$ K and an ordered moment perpendicular to the $\rm CoO_2$ layers. The magnetic order encompasses nearly 100% of the crystal volume. The susceptibility exhibits a broad peak around 30 K, characteristic of two-dimensional antiferromagnetic fluctuations. The in-plane resistivity is metallic at high temperatures and exhibits a minimum at $\rm T_N$ .

Keywords

Antiferromagnetism Na0.82CoO2 Néel Temperature Muon Spin Rotation Resistivity

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@article{arxiv.cond-mat/0312376,
  title  = {Bulk antiferromagnetism in $\bf Na_{0.82}CoO_2$ single crystals},
  author = {S. Bayrakci and C. Bernhard and D. P. Chen and B. Keimer and R. K. Kremer and P. Lemmens and C. T. Lin and C. Niedermayer and J. Strempfer},
  journal= {arXiv preprint arXiv:cond-mat/0312376},
  year   = {2009}
}

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Bulk antiferromagnetism in $\bf Na_{0.82}CoO_2$ single crystals

Abstract

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