Cation, magnetic, and charge ordering in MnFe3O5† †Electronic supplementary information (ESI) available: Tables of crystallographic results and powder synchrotron profile fit. See DOI: 10.1039/c8tc00053k

The high pressure material MnFe3O5 displays a rich variety of magnetically ordered states on cooling through three separate phase transitions.
The recently-discovered high pressure material MnFe3O5 displays a rich variety of magnetically ordered states on cooling. Fe spins order antiferromagnetically below a Néel transition at 350 K. A second transition at 150 K marks Mn spin order that leads to spin canting of some of the Fe spins and ferrimagnetism. A further transition at 60 K is driven by charge ordering of Fe2+ and Fe3+ over two inequivalent Fe sites, with further canting of all spins. Electrical resistivity measurements reveal semiconducting behaviour in MnFe3O5 with a change in activation energy at 285 K.