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arXiv · 1107.5025

Evolution of the commensurate and incommensurate magnetic phases of the S = 3/2 kagome staircase Co3V2O8 in an applied field

Joel S. Helton·Ying Chen·Georgii L. Bychkov·Sergei N. Barilo·Nyrissa Rogado·Robert J. Cava·Jeffrey W. Lynn
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Abstract

Single crystal neutron diffraction studies have been performed on the S = 3/2 kagome staircase compound Co3V2O8 with a magnetic field applied along the magnetization easy-axis (H || a). Previous zero field measurements [Y. Chen, et al., Phys. Rev. B 74, 014430 (2006)] reported a rich variety of magnetic phases, with a ferromagnetic ground state as well as incommensurate, transversely polarized spin density wave (SDW) phases (with a propagation vector of k = (0 delta 0)) interspersed with multiple commensurate lock-in transitions. The magnetic phase diagram with H || a adds further complexity. For small applied fields, H = 0.05 T, the commensurate lock-in phases are destabilized in favor of the incommensurate SDW, while slightly larger applied fields restore the commensurate lock-in phase with delta = 1/2 and yield a new commensurate phase with delta = 2/5. For all measurements in an applied field, higher-order scattering is observed that corresponds to the second-harmonic.

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Joel S. Helton, Ying Chen, Georgii L. Bychkov, Sergei N. Barilo, Nyrissa Rogado, Robert J. Cava, Jeffrey W. Lynn. 2011-11-30. Evolution of the commensurate and incommensurate magnetic phases of the S = 3/2 kagome staircase Co3V2O8 in an applied field. https://doi.org/10.1088/0953-8984%2F24%2F1%2F016003

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