Arsenic K-edge XANES study of REFeAsO oxypnictides

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...

Full description

Saved in:
Bibliographic Details
Published in:Europhysics letters 2010-06, Vol.90 (5), p.57001
Main Authors: Xu, W, Joseph, B, Iadecola, A, Marcelli, A, Chu, W. S, Di Gioacchino, D, Bianconi, A, Wu, Z. Y, Saini, N. L
Format: Article
Language:English
Subjects:
71.20.-b
74.70.Xa
78.70.Dm
Arsenic
Disorders
Electronics
Interlayers
Magnetic properties
Mathematical analysis
Spacers
X-rays
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/90/57001