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oai:docta.ucm.es:20.500.14352/998272024-12-10T00:58:55Zcom_20.500.14352_14col_20.500.14352_15

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 Boulahya, Khalid Hassan, Manar Muñoz Gil, Daniel Romero Rodríguez, Julio Gómez Herrero, Adrián García Martín, Susana Amador, Ulises 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. 2024-02-07T09:40:11Z 2024-02-07T09:40:11Z 2015 journal article Boulahya, K., Hassan, M., Muñoz Gil, D. et al. «Exploring the Physical Properties of Eu 2 SrCo 1.5 Mn 0.5 O 7 , a New n = 2 Member of the Ruddlesden–Popper Series (Eu,Sr) n+1 (Co,Mn) n O 3n+1». Journal of Materials Chemistry A, vol. 3, n.o 45, 2015, pp. 22931-39. https://doi.org/10.1039/C5TA05464H. 2050-7488 10.1039/c5ta05464h https://hdl.handle.net/20.500.14352/99827 2050-7496 https://doi.org/10.1039/C5TA05464H eng MAT2013-46452-C4-1 R and MAT2013-46452-C4-4 R S2013/ MIT-2753 http://creativecommons.org/licenses/by-nc-nd/4.0/ restricted access Attribution-NonCommercial-NoDerivatives 4.0 International Royal Society of Chemistry