Bulk antiferromagnetism in Na₀.₈₂CoO₂ single crystals
Bayrakci, S. · Bernhard, C. · Chen, D. P. · Keimer, B. · Kremer, R. K. · Lemmens, P. · Lin, C. T. · Niedermayer, C. · Strempfer, J.
الأصل · EN
Susceptibility, specific heat, and muon spin rotation measurements on high-quality single crystals of Na₀.₈₂CoO₂ have revealed bulk antiferromagnetism with Néel temperature Tₙ = 19.8 ± 0.1 K and an ordered moment perpendicular to the CoO₂ 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 Tₙ.
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