ELNES investigations of the oxygen K-edge in spinels

被引：29

作者：

Docherty, FT ^{[1
]}

Craven, AJ

McComb, DW

Skakle, J

机构：

[1] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[2] Univ Glasgow, Dept Chem, Glasgow G12 8QQ, Lanark, Scotland

[3] Univ Aberdeen, Dept Chem, Aberdeen AB24 3UE, Scotland

[4] Univ Aberdeen, Dept Phys, Aberdeen AB24 3UE, Scotland

来源：

ULTRAMICROSCOPY | 2001年 / 86卷 / 3-4期

基金：

英国工程与自然科学研究理事会;

关键词：

electron energy-loss spectroscopy; energy-loss near-edge structure; spinels; multiple scattering calculations;

D O I：

10.1016/S0304-3991(00)00119-4

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

The results of a systematic study of the oxygen K-edge electron energy-loss spectroscopy (ELNES) from a series of aluminium- and chromium-containing spinels are presented. Extra fine structure in the region up to 10eV above the edge onset is observed for the chromium-containing compounds and is assigned to transitions to states created by mixing of oxygen 2p and metal 3d orbitals. The experimental data has been simulated using the multiple scattering code, FEFF8. Good agreement was obtained in the case of magnesium aluminate, but relatively poor agreement was obtained in the case of the chromites. The possible fingerprints in the oxygen K-edge ELNES corresponding to a high degree of inversion in the spinel structure and to a tetragonal distortion of the cubic structure are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：273 / 288

页数：16

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