  Proximity-induced magnetization (PIM) has broad implications across
interface-driven spintronics applications employing spin-currents. We directly
determine the scaling between PIM in Pt and the temperature-dependent interface
magnetization in an adjacent ferromagnet (FM) using depth-resolved
magnetometry. The magnetization due to PIM does not follow the generally
expected linear scaling with the FM interface magnetization, as a function of
temperature. Instead, it vanishes whilst the FM interface magnetization
remains. The effective magnetic susceptibilities of heavy metal (HM) layers are
shown to give rise to the previously unexplained asymmetric PIM found in
HM/FM/HM trilayers.
