Li Z, Gong J M, Da B, Tóth J, Tőkési K, Zeng R G, Ding Z J
Department of Physics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China.
Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki, 305-0044, Japan.
Sci Rep. 2023 Aug 1;13(1):12480. doi: 10.1038/s41598-023-38769-4.
The energy loss functions (ELFs) of Fe and Ni have been derived from measured reflection electron energy loss spectroscopy (REELS) spectra by a reverse Monte Carlo analysis in our previous work. In this work, we present further improvements of ELFs for these metals. For Fe, we have updated ELFs at primary electron energies of 2 keV and 3 keV in a wider photon energy region (0-180 eV) with a better accuracy, which is verified by sum rules. Regarding to Ni, we supplement the ELF at primary energy of 5 keV and we also improve the data accuracy at 3 keV. Applying these new and more accurate ELFs we present the optical constants and dielectric functions for the two metals. The improvements were highlighted by comparing our present results with the previous data.
在我们之前的工作中，通过反向蒙特卡罗分析从测量的反射电子能量损失谱（REELS）光谱中推导了铁和镍的能量损失函数（ELF）。在这项工作中，我们展示了这些金属的ELF的进一步改进。对于铁，我们在更宽的光子能量区域（0 - 180 eV）中，以更高的精度更新了2 keV和3 keV初级电子能量下的ELF，这通过求和规则得到了验证。对于镍，我们补充了5 keV初级能量下的ELF，并且还提高了3 keV下的数据精度。应用这些新的且更准确的ELF，我们给出了这两种金属的光学常数和介电函数。通过将我们目前的结果与之前的数据进行比较，突出了这些改进。
