Pair distribution function analysis of La(Fe1-xRux)AsO compounds

The local structures of La(Fe1-xRux)AsO (0.00 <= x <= 0.80) compounds were investigated by means of pair distribution function analysis at room temperature; as a result, no phase separation or clustering takes place. Local distortions are no longer correlated beyond similar to 15 angstrom for both pure and substituted samples, indicating that the presence of Ru atoms does not determine a notable variation in the length scale of the local distortion. Different types of short range correlation between Fe and Ru atoms do not produce significant changes in the pair distribution function. (C) 2014 Elsevier Inc. All rights reserved.