Effect of further-neighbor interactions on the magnetization behaviors   of the Ising model on a triangular lattice
  In this work, we study the magnetization behaviors of the classical Ising model on the triangular lattice using Monte Carlo simulations, and pay particular attention to the effect of further-neighbor interactions. Several fascinating spin states are identified to be stabilized in certain magnetic field regions, respectively, resulting in the magnetization plateaus at 2/3, 5/7, 7/9 and 5/6 of the saturation magnetization MS, in addition to the well known plateaus at 0, 1/3 and 1/2 of MS. The stabilization of these interesting orders can be understood as the consequence of the competition between Zeeman energy and exchange energy. 
J. Chen, W. Z. Zhuo, M. H. Qin, S. Dong, M. Zeng, X. B. Lu, X. S. Gao,   and J. -M. Liu
cond-mat.str-el