Bulk antiferromagnetism inNa0.82CoO2single crystals

2003/12/31 by S. Bayrakci, S. P. Bayrakci, C. Bernhard +9 · 10 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.69.100410

published as Phys. Rev. B 69, 100410(R) (2004) · published version

openalex publication_date 2004/03/25 · arxiv created 2004/03/31 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Susceptibility, specific heat, and muon spin rotation measurements on high-quality single crystals of Na_0.82CoO₂ have revealed bulk antiferromagnetism with N'eel temperature T_N=19.8\ifmmode±\else\textpm\fi0.1K 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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