RIXS-MCD of e-Fe2O3 and Cr-doped e-Fe2O3

Multiferroic materials, particularly magnetoelectrics, are intriguing for their potential to transform electronics. Of such materials, e-Fe2O3 is interesting because it is a hard ferrimagnet that exhibits strong magnetoelectric coupling at room temperature. As a single valent magnetoelectric, it avoids some of the stoichiometry problems of other magnetoelectrics, such as BiFeO3. However, decoupling the four different Fe3+ sites is non-trivial. Doping with Cr-ions perturbs some of the existing Fe-O-Fe interactions and permits deeper insights into the parent material. Through RIXS-MCD measurements, we aim to identify how d-d excitations change with both magnetic field and Cr-doping.