Spin-phonon induced magnetic order in the kagome ice
Spin-phonon induced magnetic order in the kagome ice
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DOI：
10.1103/physrevb.88.184421
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发表时间：
2013-11-20
影响因子：
3.7
通讯作者：
Rossini, G. L.
中科院分区：
文献类型：
--
作者：
Gomez Albarracin, F. A.;Cabra, D. C.;Rossini, G. L.
在面内磁场的作用下，我们研究了晶格形变对Kagome自旋冰的影响，其中伊辛自旋通过最近邻交换和长程偶极相互作用耦合。我们根据爱因斯坦模型来描述晶格能，其中每个位置的扭曲都是独立处理的。当晶格自由度积分时，产生有效的二次自旋相互作用。在磁场的不同方向下，对所得到的模型进行了经典的蒙特卡罗模拟，保留了多达第三个邻居的相互作用。我们发现，随着形变影响的增加，磁化曲线上出现了丰富的平台结构。
We study the effects of lattice deformations on the kagome spin ice, with Ising spins coupled by nearest-neighbor exchange and long-range dipolar interactions, in the presence of in-plane magnetic fields. We describe the lattice energy according to the Einstein model, where each site distortion is treated independently. Upon integration of lattice degrees of freedom, effective quadratic spin interactions arise. Classical Monte Carlo simulations are performed on the resulting model, retaining up to third neighbor interactions, under different directions of the magnetic field. We find that as the effect of the deformation is increased, a rich plateau structure appears in the magnetization curves.