Possible ferro-spin nematic order in NiGa2S4

Abstract

We explore the possibility that the spin-1 triangular lattice magnet NiGa2S4 may have a ferronematic ground state with no frozen magnetic moment but a uniform quadrupole moment. Such a state may be stabilized by biquadratic spin interactions. We describe the physical properties of this state and suggest experiments to help verify this proposal. We also contrast this state with a ``noncollinear″ nematic state proposed earlier by Tsunetsugu and Arikawa [J. Phys. Soc. Jpn. 75, 083701 (2006)] for NiGa2S4.

Publication
PHYSICAL REVIEW B 74, (2006).
Date
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