%0 Journal Article
%A García Martín, Susana
%A Martínez de Irujo Labalde, Xabier
%A Amador, Ulises
%A Ritter, Clemens
%A Goto, Masato
%A Patino, Midori Amano
%A Shimakawa, Yuichi
%T 3D to 2D Magnetic Ordering of Fe3+ Oxides Induced by Their Layered Perovskite Structure
%D 2021
%@ 0020-1669
%U https://hdl.handle.net/20.500.14352/8593
%X 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.
%~