Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, UdS-CNRS, 23 rue du Loess, BP 43, F-67034 Strasbourg Cedex 2, France.
Phys Rev Lett. 2011 Aug 19;107(8):087203. doi: 10.1103/PhysRevLett.107.087203. Epub 2011 Aug 16.
We report the discovery of 180° electron-spin precession in spin-polarized electron-reflection experiments on Fe films on Ag(001), the largest possible precession angle in a single electron reflection. Both experiments as a function of Fe film thickness and ab initio calculations show that the appearance of this ultimate spin precession depends with utmost sensitivity on the relaxation of the Fe surface layers during growth. Similar spin precession is also predicted for other ferromagnetic films.
我们报告了在 Fe/Ag(001) 体系中进行的自旋极化电子反射实验中发现的 180°电子自旋进动,这是单个电子反射中可能的最大进动角度。实验和第一性原理计算都表明,这种终极自旋进动的出现对 Fe 表面层在生长过程中的弛豫极为敏感。其他铁磁薄膜也预测有类似的自旋进动。