2018/09/20 by Pavol Farkasovsky, Lubomira Regeciova · 1 citation
Physics and Astronomy · #cond-mat.stat-mech
paper · pdf · doi:10.1140/epjb/e2019-90406-6
14 pages, 5 figures. arXiv admin note: text overlap with arXiv:0809.5249 by other authors
arxiv created 2018/09/20 · arxiv updated 2019/02/20
Magnetization plateaus and phase diagrams of the extended Ising model on the Shastry-Sutherland lattice with the first (J1), second (J2), third (J3) fourth (J4) and fifth (J5) nearest-neighbour spin couplings are studied by the classical Monte Carlo method. It is shown that switching on J4 and J5 interactions (in addition to usually considered J1, J2 and J3 interactions) changes significantly the picture of magnetization processes found for J4=J5=0 and leads to stabilization of new macroscopic magnetic phases (plateaus) with fractional magnetization. In particular, it is found that combined effects of J4 and J5 interactions generate the following sequence of plateaus with the fractional magnetization: m/ms=1/9, 1/6, 2/9, 1/3, 4/9, 1/2, 5/9 and 2/3. The results obtained are consistent with experimental measurements of magnetization curves in selected rare-earth tetraborides.