论文标题
关于电场效应PD/CO/PT薄膜磁性的理论研究
Theoretical study on the electric field effect on magnetism of Pd/Co/Pt thin films
论文作者
论文摘要
基于第一原理计算，我们研究了PD $（001）$/CO/PT薄膜结构暴露于外部电场中的PT层的电子和磁性。由于CO底层，表面PT层具有通过外部电场修饰的矩。磁场诱导的变化可以通过修饰的自旋依赖性轨道杂交来解释，该杂交随场强而非线性变化。我们为应用的外部电场计算X射线吸收和X射线磁性圆形二色光谱，并检查其对L $ _ {2} $和L $ _ {3} $边缘周围PT层中光谱的影响。我们还确定了依赖层的磁晶和晶状体各向异性，并表明可以通过外部电场在不同层中轻松调节各向异性。
Based on first principles calculations we investigate the electronic and magnetic properties of Pt layers in Pd$(001)$/Co/Pt thin film structures exposed to an external electric field. Due to the Co underlayer, the surface Pt layers have induced moments that are modified by an external electric field. The field induced changes can be explained by the modified spin-dependent orbital hybridization that varies non-linearly with the field strength. We calculate the x-ray absorption and the x-ray magnetic circular dichroism spectra for an applied external electric field and examine its impact on the spectra in the Pt layer around the L$_{2}$ and L$_{3}$ edges. We also determine the layer dependent magneto-crystalline anisotropy and show that the anisotropy can be tuned easily in the different layers by the external electric field.
