X-Ray Natural Linear Dichroism (XNLD) Applied to the Determination of Relaxations Around Transition Metal Impurities in -Al2O3

Abstract : The local environments around substitutional Cr3+ or Fe3+ ions in doped -Al2O3 have been studied experimentally by dichroic X-ray absorption at the Cr and Fe Kedges in single crystals.A reliable method has been applied to remove diffraction peaks. This paper shows that the dichroic EXAFS analysis leads to the precise determination of the environment around impurity ions in -Al2O3. The Cr or Fe coordination shell in doped -Al2O3 is similar to the one of Cr in -Cr2O3 or of Fe in -Fe2O3. Aluminum or oxygen atoms at a farther distance are weakly affected by the presence of the impurity.
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Physica Scripta, IOP Publishing, 2005, 115, pp.1041-1043
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https://hal.archives-ouvertes.fr/hal-00021945
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Soumis le : mercredi 29 mars 2006 - 16:12:13
Dernière modification le : mercredi 12 octobre 2016 - 01:04:21

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  • HAL Id : hal-00021945, version 1

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Emilie Gaudry, A. Kiratisin, Ph. Sainctavit, Ch. Brouder, Francesco Mauri, et al.. X-Ray Natural Linear Dichroism (XNLD) Applied to the Determination of Relaxations Around Transition Metal Impurities in -Al2O3. Physica Scripta, IOP Publishing, 2005, 115, pp.1041-1043. 〈hal-00021945〉

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