Rare Earths (REs) - Transition Metals (TMs) multilayers have a great importance in modern magnetism because of their unique properties due to their 4f orbitals: perpendicular magnetic anisotropy , antiferromagnetic (AF) exchange-coupling and frozen frustrated magnetic state. Due to the interface-driven nature of RE/TM systems it is difficult to measure the exact magnetic structures of the individual layers using macroscopic magnetometry (SQUID) techniques. Additionally, at low temperatures the magnetisation of a RE layer in a RE/TM bilayer will be far larger than that of the TM layer, meaning it can be extremely difficult to deconvolute the two signals. Here we propose to investigate the magnetic structure across interfaces of Co/Gd multilayer using PNR, which has its inherent properties to probe interfaces with high depth resolution.