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

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Martínez de Irujo-Labalde, Xabier and Amador, Ulises and Ritter, Clemens and Goto, Masato and Patino, Midori Amano and Shimakawa, Yuichi and García Martín, Susana (2021) 3D to 2D Magnetic Ordering of Fe3+ Oxides Induced by Their Layered Perovskite Structure. Inorganic Chemistry, 60 (11). pp. 8027-8034. ISSN 0020-1669

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Official URL: https://doi.org/10.1021/acs.inorgchem.1c00529




Abstract

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.


Item Type:Article
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CRUE-CSIC (Acuerdos Transformativos 2021)

Uncontrolled Keywords:Oxides, Crystal structure, Chemical structure, Magnetic properties, Cations
Subjects:Sciences > Chemistry > Chemistry, Inorganic
ID Code:69335
Deposited On:21 Dec 2021 09:27
Last Modified:22 Feb 2022 10:50

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