Magnetic Ordering Dependence on Iron Ions Distribution in Cu2FeBO5 Ludwigite

A comparative analysis of the copper and iron ions bonds exchange energies was conducted for various variants of orderings and distributions of iron ions among crystallographic positions in ludwigite Cu₂FeBO₅. Analysis showed that the exchange bonds of iron ions play a key role in the formation of magnetic order. The magnetic ordering strongly depends on the distribution of iron ions among the positions. In the case when the Fe³⁺ is in the same position as in Fe₃BO₅, the most favorable magnetic structure is similar to the magnetic structure of ludwigite Fe₃BO₅. In other cases, the type of magnetic ordering is different.