Arsenic K-edge X-ray absorption near-edge structure (XANES) spectroscopy has been used to investigate the local geometry around the pnictogen site in the REFeAsO (RE - La, Pr, Nd and Sm) oxypnictides, combined with full multiple-scattering calculations to understand different XANES features. The As K-edge XANES spectrum for the LaFeAsO is found to be significantly different from the other oxypnictides. The results suggest that interlayer order/disorder has a significant effect on the XANES features with the coupling between the FeAs and the REO spacers being important in the electronic and magnetic properties of the oxypnictides. Copyright (C) EPLA, 2010

Arsenic K-edge XANES study of REFeAsO oxypnictides / W., Xu; B., Joseph; Iadecola, Antonella; A., Marcelli; W. S., Chu; D., Di Gioacchino; Bianconi, Antonio; Z. Y., Wu; Saini, Naurang Lal. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - 90:5(2010), pp. 57001-57001-5. [10.1209/0295-5075/90/57001]

Arsenic K-edge XANES study of REFeAsO oxypnictides

IADECOLA, ANTONELLA;BIANCONI, Antonio;SAINI, Naurang Lal
2010

Abstract

Arsenic K-edge X-ray absorption near-edge structure (XANES) spectroscopy has been used to investigate the local geometry around the pnictogen site in the REFeAsO (RE - La, Pr, Nd and Sm) oxypnictides, combined with full multiple-scattering calculations to understand different XANES features. The As K-edge XANES spectrum for the LaFeAsO is found to be significantly different from the other oxypnictides. The results suggest that interlayer order/disorder has a significant effect on the XANES features with the coupling between the FeAs and the REO spacers being important in the electronic and magnetic properties of the oxypnictides. Copyright (C) EPLA, 2010
2010
01 Pubblicazione su rivista::01a Articolo in rivista
Arsenic K-edge XANES study of REFeAsO oxypnictides / W., Xu; B., Joseph; Iadecola, Antonella; A., Marcelli; W. S., Chu; D., Di Gioacchino; Bianconi, Antonio; Z. Y., Wu; Saini, Naurang Lal. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - 90:5(2010), pp. 57001-57001-5. [10.1209/0295-5075/90/57001]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/364693
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