%0 Journal Article
%A Martínez de Irujo Labalde, Xavier
%A Goto, Masato
%A Urones Garrote, Esteban
%A Amador, Ulises
%A Ritter, Clemente
%A Amano Patino, Midori
%A Shimakawa, Yuichi
%A García Martín, Susana
%T Charge evolution in the Y0.9Ba1.7Ca2.4Fe5O14.7 layered perovskite
%D 2024
%U https://hdl.handle.net/20.500.14352/118080
%X 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.
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