Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden.
Phys Rev Lett. 2010 Apr 16;104(15):156402. doi: 10.1103/PhysRevLett.104.156402. Epub 2010 Apr 15.
Using density functional calculations, we have studied the magnetic properties of nanocomposites composed of rare-earth-metal elements in contact with 3d transition metals (Fe and Cr). We demonstrate the possibility to obtain huge magnetic moments in such nanocomposites, of order 10mu(B)/rare-earth-metal atom, with a potential to reach the maximum magnetic moment of Fe-Co alloys at the top of the so-called Slater-Pauling curve. A first experimental proof of concept is given by thin-film synthesis of Fe/Gd and Fe/Cr/Gd nanocomposites, in combination with x-ray magnetic circular dichroism.
利用密度泛函计算，我们研究了由 3d 过渡金属（Fe 和 Cr）接触的稀土金属元素组成的纳米复合材料的磁性能。我们证明了在这种纳米复合材料中获得巨大磁矩的可能性，每个稀土金属原子的磁矩约为 10μB，有可能达到所谓斯莱特-保尔曲线顶端的 Fe-Co 合金的最大磁矩。通过 Fe/Gd 和 Fe/Cr/Gd 纳米复合材料的薄膜合成，并结合 X 射线磁圆二色性，给出了初步的实验概念验证。
