García Martín, SusanaMartínez de Irujo Labalde, XabierAmador, UlisesRitter, ClemensGoto, MasatoPatino, Midori AmanoShimakawa, Yuichi2023-06-172023-06-172021-05-190020-166910.1021/acs.inorgchem.1c00529https://hdl.handle.net/20.500.14352/8593CRUE-CSIC (Acuerdos Transformativos 2021)The antiferromagnetic behavior of Fe3+ oxides of composition RE1.2Ba1.2Ca0.6Fe3O8, RE2.2Ba3.2Ca2.6Fe8O21, and REBa2Ca2Fe5O13 (RE = Gd, Tb) is highly influenced by the type of oxygen polyhedron around the Fe3+ cations and their ordering, which is coupled with the layered RE/Ba/Ca arrangement within the perovskite-related structure. Determination of the magnetic structures reveals different magnetic moments associated with Fe3+ spins in the different oxygen polyhedra (octahedron, tetrahedron, and square pyramid). The structural aspects impact on the strength of the Fe-O-Fe superexchange interactions and, therefore, on the Neel temperature ( ́ TN) of the compounds. The oxides present an interesting transition from three-dimensional (3D) to two-dimensional (2D) magnetic behavior above TN. The 2D magnetic interactions are stronger within the FeO6 octahedra layers than in the FeO4 tetrahedra layers.engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttps://doi.org/10.1021/acs.inorgchem.1c00529https://pubs.acs.org/doi/abs/10.1021/acs.inorgchem.1c00529open accessOxidesCrystal structureChemical structureMagnetic propertiesCationsAntiferromagnetismQuímica inorgánica (Química)2303 Química Inorgánica