Proximity induced magnetism in Pt layered with rare-earth:transition metal ferrimagnetic alloys [dataset]

The proximity induced moment (PIM) in heavy metal layers may play a significant role in heterostructured spintronic systems. In particular, the PIM of a heavy metal adjacent to a magnetic layer has been linked to interfacial spin transport behavior. Element-resolved X-ray magnetic measurements were used to investigate PIM in Pt layered with two different rare-earth (RE):3d transition metal (TM) ferrimagnetic alloys, in which the net moment was dominated by either the RE or the TM at room temperature. We observed significant PIM in Pt confined to a 2 nm interfacial region for Pt/Co77Gd23 and Pt/(Fe50Co50)77Gd23 and, in both cases, the PIM was parallel to the TM sublattice rather than the RE or the net moment. Our results highlight the prominence of the d − d mediated interactions between the Pt and the constituents of the ferrimagnetic RE:TM alloys over the net macroscopic moment.