Multi-step magnetization of the Ising model on a Shastry-Sutherland lattice: a Monte Carlo simulation
Multi-step magnetization of the Ising model on a Shastry-Sutherland lattice: a Monte Carlo simulation
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Shastry-Sutherland 晶格上 Ising 模型的多步磁化：蒙特卡罗模拟
DOI：
10.1088/0953-8984/24/38/386003
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发表时间：
2012-09-26
影响因子：
2.7
通讯作者：
Liu, J-M
中科院分区：
文献类型：
--
作者：
Huang, W. C.;Huo, L.;Liu, J-M
为了理解TmB 4和其他稀土四硼化物中的磁化平台现象，利用Monte Carlo方法研究了Shastry-Sutherland晶格上经典Ising模型的磁化行为和自旋组态.模拟再现1/2磁化平台，考虑到偶极-偶极相互作用。此外，在我们的模拟中预测了在低温下的窄的2/3磁化台阶。多阶磁化可以理解为自旋交换相互作用、偶极-偶极相互作用和静态磁能之间竞争的结果。
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 TmB4 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.