Exploring the physical properties of Eu2SrCo1.5Mn0.5O7, a new n=2 member of the Ruddlesden-Popper series (Eu,Sr)(n+1)(Co,Mn)(n)O3n+1
authors Boulahya, K; Hassan, M; Gil, DM; Romero, J; Herrero, AG; Martin, SG; Amador, U
nationality International
journal JOURNAL OF MATERIALS CHEMISTRY A
keywords OXIDE FUEL-CELLS; COMPLEX MAGNETIC-BEHAVIOR; MN/CO ATOMIC ORDER; ELECTRICAL-CONDUCTIVITY; K2NIF4-TYPE STRUCTURE; THERMAL-EXPANSION; CRYSTAL-STRUCTURE; SOLID-SOLUTION; TEMPERATURE; CATHODES
abstract 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 = 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 cm(2) at 700 degrees C 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 (T-C similar to 121 K) within an ordered Co2+/Mn4+ atomic configuration, whereas at lower temperature (similar to 21 K) a spin glass state occurs.
publisher ROYAL SOC CHEMISTRY
issn 2050-7488
year published 2015
volume 3
issue 45
beginning page 22931
ending page 22939
digital object identifier (doi) 10.1039/c5ta05464h
web of science category Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary
subject category Chemistry; Energy & Fuels; Materials Science
unique article identifier WOS:000365011400049
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journal impact factor 9.931
5 year journal impact factor 9.531
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