Theory of the spin dynamics of bulk Fe and ultrathin Fe(100) films
Theory of the spin dynamics of bulk Fe and ultrathin Fe(100) films
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DOI：
10.1016/s0304-8853(98)00088-2
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发表时间：
1998-08
影响因子：
2.7
通讯作者：
H. Tang;M. Plihal;D. Mills
中科院分区：
文献类型：
--
作者：
H. Tang;M. Plihal;D. Mills
我们目前的理论研究的自旋动力学的体铁和铁（100）薄膜，在一个经验紧束缚描述的一个电子的能量。我们使用Slater-Koster参数化的散装顺磁能带，并将这些应用到电影。铁磁基态是通过在每个原子的d壳层内引入原子内库仑排斥而产生的。原子内库仑矩阵元表示的三个拉卡参数，其值被选择来描述的铁磁性的散装。在无规相位近似下，我们计算了体材料和（100）面薄膜的横向动态自旋极化率。这种方法描述了这些系统的自旋波激发，以及它们的Stoner谱。
We present theoretical studies of the spin dynamics of bulk Fe and of ultrathin Fe(100) films, within an empirical tight binding description of the one electron energies. We use a Slater–Koster parameterization of the bulk paramagnetic energy bands, and apply these to the film. Ferromagnetic ground states are generated by introducing intra-atomic Coulomb repulsion within the d shell of each atom. The intra-atomic Coulomb matrix elements are expressed in terms of three Racah parameters, whose values are chosen to describe the ferromagnetism of the bulk. We calculate the transverse dynamic spin susceptibility of both the bulk and a film with a (100) surface, within the random phase approximation (RPA). Such an approach describes the spin wave excitations of these systems, and their Stoner spectrum as well.