X-RAY PHOTOELECTRON SPECTROSCOPIC STUDIES OF CRO2 AND SOME RELATED CHROMIUM COMPOUNDS
X-RAY PHOTOELECTRON SPECTROSCOPIC STUDIES OF CRO2 AND SOME RELATED CHROMIUM COMPOUNDS
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DOI：
10.1016/s0022-4596(76)80012-6
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发表时间：
1976-01-01
影响因子：
3.3
通讯作者：
THOMAS, JM
中科院分区：
文献类型：
--
作者：
IKEMOTO, I;ISHII, K;THOMAS, JM
本文研究了CrO_2、CrOOH、Cr_2O_3和K_2Cr_2O_7晶体的芯电子区和价带区。CrO 2的价带区的XPS谱可以用古迪纳夫的能带结构模型来解释，并且这种金属化合物在费米能级的有限态密度是显而易见的，但是能带分布在穿过居里温度时没有显示出可检测的变化。而在CrO 2和Cr2 O3中记录的Cr 3s水平的多重峰分裂的比率与理论合理一致，观察到的和预期的多重峰强度比率之间的差异被指出。还注意到了一些关于震荡卫星的证据。讨论了Cr ~（4+）固体（CrO_2）中的核电子能级结合能小于Cr ~（3+）化合物（Cr_2O_3和CrOOH）中相应的结合能。
Core-electron and valence-band regions of crystalline CrO2, CrOOH, Cr2O3, and K2Cr2O7have been studied. The XPS spectrum of the valence band region of CrO2is interpretable in terms of Goodenough's band-structure model, and the finite density of states at the Fermi level for this metallic compound is readily apparent, but the band profile shows no detectable change on traversing the Curie temperature. Whereas the ratio of the multiplet splittings recorded for Cr 3slevels in CrO2and Cr2O3are in reasonable agreement with theory, discrepancies were noted between observed and expected multiplet intensity ratios. Some evidence for shake-up satellites was also noted. The smaller binding energies of core-electron levels in the Cr4+solid (CrO2) compared with the corresponding binding energies in Cr3+compounds (Cr2O3and CrOOH) are also discussed.