Charge Evolution in the Y0.9Ba1.7Ca2.4Fe5O14.7 Layered Perovskite

The A mixed-valence Y0.9Ba1.7Ca2.4Fe5O14.7 layered perovskite is obtained after topochemical oxygen insertion in Y0.9Ba1.7Ca2.4Fe5O13 under ozone flow. The crystal structure has been determined with a combination of diffraction and microscopy techniques. Mössbauer spectroscopy reveals a 5 Fe3.8+ →...

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Bibliographic Details
Published in:Chemistry of materials 2024-05, Vol.36 (10), p.5184-5191
Main Authors: de Irujo-Labalde, Xabier Martínez, Goto, Masato, Urones-Garrote, Esteban, Amador, Ulises, Ritter, Clemens, Amano-Patino, Midori, Shimakawa, Yuichi, García-Martín, Susana
Format: Article
Language:English
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Summary:The A mixed-valence Y0.9Ba1.7Ca2.4Fe5O14.7 layered perovskite is obtained after topochemical oxygen insertion in Y0.9Ba1.7Ca2.4Fe5O13 under ozone flow. The crystal structure has been determined with a combination of diffraction and microscopy techniques. Mössbauer spectroscopy reveals a 5 Fe3.8+ → 2 Fe3+ + 3 Fe(4+δ)+ charge disproportionation accompanied by a smooth magnetic and electronic transition beginning at about 125 K. A layered arrangement of Fe3+ and Fe(4+δ)+ assisted by the layered character of the crystal structure is suggested. Two-dimensional magnetic interactions are detected from the magnetic behavior of the oxide and neutron diffraction experiments.
ISSN:0897-4756
1520-5002
DOI:10.1021/acs.chemmater.4c00552