In this Article, we provided the complete phase diagram of NdFeAsO1-xFx solid solution as a function of electron doping thanks to the careful determination of F- and O-content and phase content We gave direct evidence of the source of F-depletion in the superconducting main phase, that is, the formation of oxyfluoride spurious phase The approach reported in this work clearly showed that to give reliable results on these complex new superconducting materials, a rigorous control of the chemical composition of the considered phases has to be carried out
Phase Diagram of NdFeAsO1-xFx: Essential Role of Chemical Composition / L.Malavasi; GA.Artioli; C.Ritter; B.Pahari; A.Caneschi;C. Mozzati; M. Maroni. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - STAMPA. - 132:(2010), pp. 2417-2420. [10.1021/ja910426d]
Phase Diagram of NdFeAsO1-xFx: Essential Role of Chemical Composition
CANESCHI, ANDREA;
2010
Abstract
In this Article, we provided the complete phase diagram of NdFeAsO1-xFx solid solution as a function of electron doping thanks to the careful determination of F- and O-content and phase content We gave direct evidence of the source of F-depletion in the superconducting main phase, that is, the formation of oxyfluoride spurious phase The approach reported in this work clearly showed that to give reliable results on these complex new superconducting materials, a rigorous control of the chemical composition of the considered phases has to be carried out
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