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Temperature dependent local atomic displacements in Ru substituted SmFe<sub>1−<i>x</i></sub>Ru<sub><i>x</i></sub>AsO<sub>0.85</sub>F<sub>0.15</sub>superconductors
The local structure of SmFe1−xRuxAsO0.85F0.15 (x = 0.0, 0.05, 0.25 and 0.5) superconductors has been investigated by temperature dependent As K-edge extended x-ray absorption fine structure analysis. The effect of Ru substitution remains confined to the iron–arsenide layer but neither the static disorder nor the Fe–As bond strength suffers any …