L3/L2 white-line intensity ratios in the electron energy-loss spectra of 3d transition-metal oxides
✍ Scribed by T.G. Sparrow; B.G. Williams; C.N.R. Rao; J.M. Thomas
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 308 KB
- Volume
- 108
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The Lx/L2 white-line intensity ratio in transition-metal oxides deviates widely from the statistical value of 2 : 1 but shows interesting systematics. In a series of osides of a _eiven metal, the ratio reaches a maximum for the d' contignation (eg. hln0) and a minimum for the do configuration (e.g. Khln04). In a series of monosides. sesquiosides and diosides of different metals, the ratio is again a maximum at the d' configuration and decreases as the confipuration chanSes towards do or d*O. Our results. obtained by electron energy-loss spectroscopy. carried out in an electron microscope_ are interpreted on an atomic mechanism involving spin-spin coupling. According to this model, the L, transition probabiliry decreases in the progression do to ds whereas the Lg transition probability decreases beyond ds.