Journal
PHYSICAL REVIEW B
Volume 69, Issue 10, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.69.100410
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Susceptibility, specific heat, and muon spin rotation measurements on high-quality single crystals of Na0.82CoO2 have revealed bulk antiferromagnetism with Neel temperature T-N=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 T-N.
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