3D to 2D Magnetic Ordering of Fe³⁺ Oxides Induced by Their Layered Perovskite Structure.

ABSTRACT: The antiferromagnetic behavior of Fe³⁺ oxides of composition RE_1.2Ba_1.2Ca_0.6Fe₃O₈, RE_2.2Ba_3.2Ca_2.6Fe₈O₂₁, 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, the

SUBMITTER: de Irujo-Labalde XM 

PROVIDER: S-EPMC8478276 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature