Zdyb R, Pavlovska A, Bauer E
Department of Physics, Arizona State University, Tempe, AZ, 85287-1504, USA. Institute of Physics, Maria Curie-Sklodowska University, Plac M Curie-Sklodowskiej 1, 20-031 Lublin, Poland.
J Phys Condens Matter. 2009 Aug 5;21(31):314012. doi: 10.1088/0953-8984/21/31/314012. Epub 2009 Jul 7.
Magnetic properties of iron films grown on Au layers with different thicknesses on a W(110) surface are studied with spin polarized low energy electron microscopy. The iron thickness for the onset of ferromagnetic order depends approximately linearly on the thickness of underlying gold film. The easy axis direction also depends upon the Au thickness. It is parallel to the tungsten [Formula: see text] direction at the onset of magnetization for one and two monolayers of gold. For thicker gold films the easy axis is parallel to the [001] direction. The direction of the easy axis and the onset of ferromagnetic order are discussed in terms of magnetic anisotropies, interaction between the iron overlayer, gold and tungsten substrate, Fe film strain and morphology.
利用自旋极化低能电子显微镜研究了在W(110)表面不同厚度金层上生长的铁膜的磁性。铁磁序开始时的铁厚度大约与下层金膜的厚度呈线性关系。易轴方向也取决于金的厚度。对于一到两个金单层，在磁化开始时易轴平行于钨的[公式：见正文]方向。对于更厚的金膜，易轴平行于[001]方向。从磁各向异性、铁覆盖层、金和钨衬底之间的相互作用、铁膜应变和形貌等方面讨论了易轴方向和铁磁序的开始。
