Enhanced Ferromagnetic Interaction at Mnp/Fe Interface: A Bloch Law Based Study for Temperature and Magnetic Field Evolution of Magnetization

Enhancement of magnetic functionality in a film due to the addition of a thin magnetic layer on top of the film is an interesting field for both fundamental and applied research. This is related to the magnetic proximity effect (MPE). We explore the MPE-mediated spin properties of an MnP(100nm) and Fe(5nm) bilayer thin film heterostructure fabricated by combined molecular beam epitaxy and sputtering. We find that the addition of iron increases the Curie temperature, saturation magnetization, and coercivity, expanding the range of ferromagnetism for MnP. A detailed analysis based on Bloch’s law for the temperature and magnetic field evolution of magnetization reveals MPE-enhanced ferromagnetic interaction at MnP/Fe interface which extends long-range ferromagnetic ordering throughout the MnP layer. Our findings propose a promising avenue for exploring the magnetic properties of thin film heterostructures, both in increasing the practical application of ferromagnetic materials and providing new insights into interfacial magnetic interactions.