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oai:docta.ucm.es:20.500.14352/1180802025-03-18T12:25:57Zcom_20.500.14352_14col_20.500.14352_15

Martínez de Irujo Labalde, Xavier Goto, Masato Urones Garrote, Esteban Amador, Ulises Ritter, Clemente Amano Patino, Midori Shimakawa, Yuichi García Martín, Susana 2025-02-14T10:08:15Z 2025-02-14T10:08:15Z 2024-05-10 De Irujo-Labalde, Xabier Martínez, et al. «Charge Evolution in the Y0.9 Ba1.7 Ca2.4 Fe5 O14.7 Layered Perovskite». Chemistry of Materials, vol. 36, n.o 10, mayo de 2024, pp. 5184-91. DOI.org (Crossref), https://doi.org/10.1021/acs.chemmater.4c00552. 10.1021/acs.chemmater.4c00552 https://hdl.handle.net/20.500.14352/118080 https://doi.org/10.1021/acs.chemmater.4c00552 https://pubs.acs.org/doi/10.1021/acs.chemmater.4c00552 The A mixed-valence Y0.9Ba1.7Ca2.4Fe5O14.7 layeredperovskite is obtained after topochemical oxygen insertion inY0.9Ba1.7Ca2.4Fe5O13 under ozone flow. The crystal structure has been determined with a combination of diffraction and microscopytechniques. Mössbauer spectroscopy reveals a 5 Fe3.8+ → 2 Fe3+ + 3Fe(4+δ)+ charge disproportionation accompanied by a smoothmagnetic and electronic transition beginning at about 125 K. Alayered arrangement of Fe3+ and Fe(4+δ)+ assisted by the layeredcharacter of the crystal structure is suggested. Two-dimensionalmagnetic interactions are detected from the magnetic behavior ofthe oxide and neutron diffraction experiments. eng http://creativecommons.org/licenses/by/4.0/ open access Attribution 4.0 International Charge evolution in the Y0.9Ba1.7Ca2.4Fe5O14.7 layered perovskite journal article