Double phase transition in the triangular antiferromagnet Ba3CoTa2O9.

  title={Double phase transition in the triangular antiferromagnet Ba3CoTa2O9.},
  author={K. M. Ranjith and K. Brinda and U. Arjun and N. Hegde and R. Nath},
  journal={Journal of physics. Condensed matter : an Institute of Physics journal},
  volume={29 11},
  • K. M. Ranjith, K. Brinda, +2 authors R. Nath
  • Published 2017
  • Chemistry, Medicine, Physics
  • Journal of physics. Condensed matter : an Institute of Physics journal
Here, we report the synthesis and magnetic properties of a new triangular lattice antiferromagnet Ba3CoTa2O9. The effective spin of Co2+ is found to be J  =  1/2 at low temperatures due to the combined effect of crystal field and spin-orbit coupling. Ba3CoTa2O9 undergoes two successive magnetic phase transitions at [Formula: see text] K and [Formula: see text] K in zero applied field, which is typical for triangular antiferromagnets with the easy-axis magnetic anisotropy. With increasing field… Expand
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