3d 金属电离损失谱研究

INVESTIGATION OF 3d TRANSITION METALS BY IONIZATION LOSS SPECTROSCOPY

本文利用俄歇电子谱仪对Ti,Cr,Ni,Cu等3d金属的电离损失谱作研究,得到它们的空态密度的一些性质:空态密度的最大值位置、空态密度最大值的相对数值和空态密度的宽度。所得结果与理论模型一致。另外,从电离损失谱获得的束缚能值和自旋-轨道分裂值与用XPS所获结果符合良好。电离损失谱是一种研究空态密度的有效方法。

A simple method has been developed in our laboratory, namely, lonization Loss Spectros-copy (ILS) for unoccupied DOS measurement which can be performed with existing Auger electron spectroscopy apparatus. The results of spin-orbit splitting and binding energy obtained by ILS are in excellent agreement with that of ESCA. The ILS spectra of 3d transition metals, Ti, Cr, Ni, Cu have been measured. The typical integral spectra exhibit a peak-like shape with different intensity and width which reflects the width of the unoccupied DOS. Since the unoccupied 3d DOS of Cu is zero, the ILS spectrum of Cu measured is shown by a step-like structure resulting from the flat, narrow 4s DOS.