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beta-Cu3V2O8: Magnetic ordering in a spin-1/2 kagome-staircase lattice

N. Rogado·M. K. Haas·G. Lawes·D. A. Huse·A. P. Ramirez·R. J. Cava
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Abstract

The spin-1/2 Cu2+ ions in beta-Cu3V2O8 occupy the sites of a Kagome-staircase lattice, an anisotropic variant of the Kagome net: buckled layers and imbedded plaquettes of three edge-shared CuO4 squares break the ideal Kagome symmetry. Susceptibility and heat capacity measurements show the onset of short-range ordering at approximately 75 K, and a magnetic phase transition with the characteristics of antiferromagnetism at ~29 K. Comparison to the Curie Weiss theta (theta,CW = -135 K) indicates that the geometric frustration is largely relieved by the anisotropy. A ferromagnetic contribution to the magnetization below the ordering temperature and negative magnetization in zero-field cooled measurements at low fields are attributed to uncompensated spins at grain boundaries or defects.

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N. Rogado, M. K. Haas, G. Lawes, D. A. Huse, A. P. Ramirez, R. J. Cava. 2002-11-25. beta-Cu3V2O8: Magnetic ordering in a spin-1/2 kagome-staircase lattice. https://doi.org/10.1088/0953-8984%2F15%2F6%2F317

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