X-ray fluorescence induced by standing waves in the grazing-incidence and grazing-exit modes: study of the Mg–Co–Zr system

Abstract : We present the characterization of Mg-Co-Zr tri-layer stacks by using x-ray fluorescence induced by x-ray standing waves, both in the grazing incidence (GI) and grazing exit (GE) modes. The introduction of a slit in the direction of the detector improves the angular resolution by a factor 2 and significantly the sensitivity of the technique for the chemical characterization of the buried interfaces. By observing the intensity variations of the Mg Kalpha and Co Lalpha characteristic emissions as a function of the incident (GI mode) or detection (GE mode) angle, we show that the interfaces of the Si/[Mg/Co/Zr] x30 multilayer are abrupt, whereas in the Si/[Mg/Zr/Co] x30 multilayer a strong intermixing occurs at the Co-on-Zr interfaces. The explanation of this opposite behaviour of the Co-on-Zr and Zr-on-Co interfacesis given by the calculation of the mixing enthalpies of the Co-Mg, Co-Zr and Mg-Zr systems, which shows that the Co-Zr system presents anegative value and the two others positive values. Together with the difference of the surface free energies of Zr and Co, this leads us to consider the Mg/Zr/Co system as aMg/Co x Zr y bi-layer stack, with x/y estimated around 3.5.
Type de document :
Article dans une revue
Journal of Synchrotron Radiation, International Union of Crystallography, 2015, 22 (6), pp.1419-1425. 〈http://scripts.iucr.org/cgi-bin/paper?S1600577515016239〉. 〈10.1107/S1600577515016239〉
Liste complète des métadonnées

Littérature citée [14 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-01224951
Contributeur : Philippe Jonnard <>
Soumis le : jeudi 5 novembre 2015 - 14:06:23
Dernière modification le : jeudi 11 janvier 2018 - 06:27:22
Document(s) archivé(s) le : vendredi 28 avril 2017 - 07:41:16

Fichiers

XRF-XSW-Co-Mg-Zr.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Citation

Yuchun Tu, Yanyan Yuan, Karine Le Guen, Jean-Michel André, Jingtao Zhu, et al.. X-ray fluorescence induced by standing waves in the grazing-incidence and grazing-exit modes: study of the Mg–Co–Zr system. Journal of Synchrotron Radiation, International Union of Crystallography, 2015, 22 (6), pp.1419-1425. 〈http://scripts.iucr.org/cgi-bin/paper?S1600577515016239〉. 〈10.1107/S1600577515016239〉. 〈hal-01224951v2〉

Partager

Métriques

Consultations de la notice

367

Téléchargements de fichiers

81