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Magnetic structure of the quasi-two-dimensional compound CoTa2O6

Abstract : We report on a detailed investigation of magnetic properties of CoTa2O6 using several techniques: neutron and X-ray diffraction, specific-heat, magnetic susceptibility, and magnetization measurements. The compound shows quasi-two-dimensional behavior due to its layered structure of alternating Co-O and Ta-O planes. We find that all magnetic moments lie entirely in the Co-O planes, along easy axes determined by the orientations of oxygen octahedra that surround the Co ions. The easy axes in successive magnetic planes have relative orientations that differ by 90°. Antiferromagnetic ordering is observed below 6.6 K, with propagation vectors (±1/4,1/4,1/4) associated to the two non-equivalent sets of Co2+ ions, whose magnetic moments are perpendicularly oriented.
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Submitted on : Monday, December 12, 2011 - 3:48:37 PM
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E.J. Kinast, C.A. dos Santos, D. Schmitt, Olivier Isnard, M.A. Gusmao, et al.. Magnetic structure of the quasi-two-dimensional compound CoTa2O6. Journal of Alloys and Compounds, Elsevier, 2010, 491 (1-2), pp.41-44. ⟨10.1016/j.jallcom.2009.10.241|⟩. ⟨insu-00650992⟩



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