%0 Journal Article
%A Boulahya, Khalid
%A Hassan, Manar
%A Muñoz Gil, Daniel
%A Romero Rodríguez, Julio
%A Gómez Herrero, Adrián
%A García Martín, Susana
%A Amador, Ulises
%T Exploring the physical properties of Eu2SrCo1.5Mn0.5O7, a new n = 2 member of the Ruddlesden–Popper series (Eu,Sr)n+1(Co,Mn)nO3n+1
%D 2015
%@ 2050-7488
%U https://hdl.handle.net/20.500.14352/99827
%X A new oxide of the Ruddlesden–Popper series has been isolated and structurally characterized in the Eu–Sr–Co–Mn–O system. X-ray diffraction and electron microscopy show that polycrystalline Eu2SrCo1.5Mn0.5O7 constitutes the n ¼ 2 member of a homologous series, the essential feature of which is the existence of two connected Co/Mn octahedral layers, separated by Eu atoms. Electrochemical studies show that the area-specific resistance of this compound is 0.15 Omega cm2 at 700 ºC in air, a performance which is comparable to that of the best state-of-the-art materials used as cathodes in intermediate temperature solid oxide fuel cells. Below 150 K the title material presents two different magnetic phenomena. The first one corresponds to the formation of ferromagnetic nanoclusters (TC = 121 K) within an ordered Co2+/Mn4+ atomic configuration, whereas at lower temperature (21 K) a spin glass state occurs.
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