Simultaneous Observation of the Er- and Fe-Sublattice Magnetization of Ferrimagnetic Er3Fe5O12 in High Magnetic Fields Using X-Ray Magnetic Circular Dichroism at the Er L2,3 Edges

X-ray magnetic circular dichroism (XMCD) studies at the Er L-2,L-3 edges of Er3Fe5O12 exhibit a change of the spectral shape as a function of temperature and magnetic field. Using singular value decomposition, this variation is understood as a linear combination of two components. The dominating component is associated with the Er magnetization, while the second contribution is identified as an induced signal from the Fe sites. XMCD at either of the L edges in Er3Fe5O12 provides information on the net magnetization of both sublattices. Their evolution in fields up to 30 T reveals details of the ferrimagnetic interactions on two very different scales.