The Kagome-staircase lattice: Magnetic ordering in Ni3V2O8 and Co3V2O8

Details The Kagome-staircase lattice: Magnetic ordering in Ni3V2O8 and Co3V2O8 The Kagome-staircase lattice: Magnetic ordering in Ni3V2O8 and Co3V2O8

2002-11-25

arxiv.org/abs/cond-mat/0211572v1

Solid State Commun. 124, 229 (2002)

Physics

Condensed Matter

9 pages, 5 figures

Scientific paper

10.1016/S0038-1098(02)00597-5

Ni3V2O8 and Co3V2O8 have spin-1 and spin-3/2 magnetic lattices that are a new anisotropic variant of the Kagome net, wherein edge-sharing MO6 octahedra form the rises and rungs of a "Kagome staircase". The anisotropy largely relieves the geometric frustration, but results in rich magnetic behavior. Characterization of the magnetization of polycrystalline samples reveals that the compounds are ferrimagnetic in character. Heat capacity measurements show the presence of four magnetic phase transitions below 9 K for Ni3V2O8 and two below 11 K for Co3V2O8. Comparison to the low temperature heat capacity of isostructural nonmagnetic Zn3V2O8 provides an estimate of the magnetic entropy involved with the phase transitions. The results suggest that Co3V2O8 may display magnetic transitions below 2 K.

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