Institute for Advanced Materials, South China Academy of Advanced Photonics Engineering, South China Normal University, Guangzhou 510006, People's Republic of China.
J Phys Condens Matter. 2012 Sep 26;24(38):386003. doi: 10.1088/0953-8984/24/38/386003. Epub 2012 Aug 28.
The magnetization behaviors and spin configurations of the classical Ising model on a Shastry-Sutherland lattice are investigated using Monte Carlo simulations, in order to understand the fascinating magnetization plateaus observed in TmB(4) and other rare-earth tetraborides. The simulations reproduce the 1/2 magnetization plateau by taking into account the dipole-dipole interaction. In addition, a narrow 2/3 magnetization step at low temperature is predicted in our simulation. The multi-step magnetization can be understood as the consequence of the competitions among the spin-exchange interaction, the dipole-dipole interaction, and the static magnetic energy.
我们利用蒙特卡罗模拟方法研究了 Shastry-Sutherland 格子上经典伊辛模型的磁化行为和自旋构型，以理解 TmB(4) 和其他稀土四硼化物中观察到的迷人的磁化平台。通过考虑偶极-偶极相互作用，模拟再现了 1/2 磁化平台。此外，我们的模拟预测在低温下存在一个狭窄的 2/3 磁化台阶。多步磁化可以理解为自旋交换相互作用、偶极-偶极相互作用和静磁能之间竞争的结果。
