ELECTRON-ENERGY-LOSS NEAR-EDGE STRUCTURES IN THE OXYGEN K-EDGE SPECTRA OF TRANSITION-METAL OXIDES

被引：192

作者：

KURATA, H ^{[1
]}

LEFEVRE, E ^{[1
]}

COLLIEX, C ^{[1
]}

BRYDSON, R ^{[1
]}

机构：

[1] UNIV SURREY, DEPT MAT SCI & ENGN, GUILDFORD GU2 5XH, SURREY, ENGLAND

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.47.13763

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Oxygen K-edge electron-energy-loss spectra have been recorded for several transition-metal oxides (NiO, MnO, MnO2, TiO2, Cr2O3, Mn2O3) of different crystal structures. The origin of the distinct features which can be identified over 40 eV above threshold is discussed in terms of resonance scattering within shells of neighboring anionic backscatterers. Full multiple-scattering calculations corroborate and correct the simple approach. The first peak at threshold is due to transitions to oxygen 2p states hybridized with the narrow metal 3d band which is highly localized around the metal-atom sites. The other near-edge structures are dominated by the arrangement of oxygen anions around the excited central atom.

引用

页码：13763 / 13768

页数：6

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