Institute of Physics, Maria Curie-Sklodowska University, 20-031 Lublin, Poland.
J Phys Condens Matter. 2013 Jul 10;25(27):272201. doi: 10.1088/0953-8984/25/27/272201. Epub 2013 Jun 14.
The spin-dependent reflectivity of slow electrons from ultrathin Fe films on W(110) has been measured with spin polarized low energy electron microscopy. From the amplitude of the quantum size oscillations observed in the reflectivity curves the spin-dependent inelastic mean free path (IMFP) of electrons in Fe has been determined in the energy range from 5 to 16 eV above the vacuum level. The resulting IMFP values for the spin-up electrons are clearly larger than those for the spin-down electrons and the difference between the two values decreases with increasing electron energy in agreement with theoretical predictions.
利用自旋极化低能电子显微镜，测量了 W(110) 上超薄 Fe 膜中慢电子的自旋相关反射率。从反射率曲线中观察到的量子尺寸振荡的幅度，可以确定费米面以上 5 到 16 电子伏特能量范围内电子的自旋相关非弹性平均自由程（IMFP）。对于自旋向上的电子，得到的 IMFP 值明显大于自旋向下的电子，并且这两个值之间的差异随着电子能量的增加而减小，这与理论预测一致。
