Magnetic Ordering Dependence on Iron Ions Distribution in Cu2FeBO5 Ludwigite

Nazarenko, I. I.; Sofronova, S. N.; Moshkina, E. M. Source: JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS, 126 (5):674-682; 10.1134/S1063776118050047 MAY 2018

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.