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

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 Eu 2 SrCo 1.5 Mn 0.5 O 7 constitutes the n = 2 member of a homologous series, the essential feature of which i...

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Published inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 3; no. 45; pp. 22931 - 22939
Main Authors Boulahya, Khalid, Hassan, Manar, Gil, Daniel Muñoz, Romero, Julio, Herrero, Adrián Gómez, Martin, Susana García, Amador, Ulises
Format Journal Article
LanguageEnglish
Published 01.11.2015
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Summary: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 Eu 2 SrCo 1.5 Mn 0.5 O 7 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 Ω cm 2 at 700 °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 ∼ 121 K) within an ordered Co 2+ /Mn 4+ atomic configuration, whereas at lower temperature (∼21 K) a spin glass state occurs. A new oxide of the Ruddlesden-Popper series has been isolated and characterized in the Eu-Sr-Co-Mn-O system.
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ISSN:2050-7488
2050-7496
DOI:10.1039/c5ta05464h