论文标题
半磁化高原和在可电交换三角形反铁磁铁中的三倍对称性破裂的起源
Half-magnetization plateau and the origin of threefold symmetry breaking in an electrically-switchable triangular antiferromagnet
论文作者
论文摘要
我们在三角晶格抗Fiferromagnet Fe $ _ {1/3} $ nbs $ _2 $上执行高场磁化测量。我们观察到磁化强度的平稳化，该磁化强度大约是饱和磁化的一半，在广泛的温度和磁场上。根据密度功能理论的计算，我们确定一组可能的磁交换常数。将这些常数纳入了我们材料的最小哈密顿模型中，我们发现高原和$ Z_3 $对称性断裂基态均来自平面和内部的抗fiferromagnetic相互作用，在竞争中起作用。这些发现与fe $ _ {1/3} $ nbs $ _2 $的磁电特性有关，该属性允许在相对较低的电流密度下电气切换抗Fiferromagnetic纹理。
We perform high-field magnetization measurements on the triangular lattice antiferromagnet Fe$_{1/3}$NbS$_2$. We observe a plateau in the magnetization centered at approximately half the saturation magnetization over a wide range of temperature and magnetic field. From density functional theory calculations, we determine a likely set of magnetic exchange constants. Incorporating these constants into a minimal Hamiltonian model of our material, we find that the plateau and of the $Z_3$ symmetry breaking ground state both arise from interplane and intraplane antiferromagnetic interactions acting in competition. These findings are pertinent to the magneto-electric properties of Fe$_{1/3}$NbS$_2$, which allow electrical switching of antiferromagnetic textures at relatively low current densities.
