Charge disproportionation and magnetic properties in perovskite iron oxides

Kuzushita, Kaori; Morimoto, Shotaro*; Nasu, Saburo*

Physica B; Condensed Matter, 329-333(1-4), p.736 - 737, 2003/05

https://doi.org/10.1016/S0921-4526(02)02478-X

The physical properties of perovskite iron oxides are closely related to the network of FeO octahedra. The charge disproportionation (2Fe Fe + Fe), not observed in SrFeO, occurs in the oxides being cut the network of FeO octahedra, for example, by introduction of Fe by substitution La for Sr and change in the dimension by insertion of SrO layer. When Co is substituted 40% of Fe in SrFeO, the magnetic order changes to ferromagnetic from antiferromagnetic and charge disproportionation is suppressed.