Tao Kun, Liu Pengfei, Guo Qing, Shen Liya, Xue Desheng, Polyakov O P, Stepanyuk V S
Key Lab for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, People's Republic of China.
School of Physics Science and Technology, Lanzhou University, Lanzhou 730000, China.
Phys Chem Chem Phys. 2017 Feb 1;19(5):4125-4130. doi: 10.1039/c6cp07811g.
The effect of the strain on the magnetic properties of metallic multilayers has been investigated by ab initio studies. Our results indicate that the magnetic anisotropy energy (MAE) of an Fe(001) surface can be drastically enhanced by capping with 5d elements. By choosing Ir-Fe multilayers as a model system, we demonstrate that the MAE which depends on the composition and the structure of the multilayers can be tuned in a large range by strain. Furthermore, our results show that not only the amplitude of the MAE but also the easy axis of Pt-Fe multilayers can be engineered by strain. Magnetization switching by strain is also investigated.
通过第一性原理研究，考察了应变对金属多层膜磁性能的影响。我们的结果表明，用5d元素覆盖可以显著提高Fe(001)表面的磁各向异性能(MAE)。通过选择Ir-Fe多层膜作为模型体系，我们证明了依赖于多层膜组成和结构的MAE可以通过应变在很大范围内进行调节。此外，我们的结果表明，不仅MAE的幅度，而且Pt-Fe多层膜的易轴都可以通过应变来设计。还研究了应变引起的磁化翻转。
