Peculiarities of the magnetic properties of thin-film three-layer Fe/Poly (diphenylene phthalide)/Fe systems

•The results of investigation of the magnetic properties of Fe/PDP/Fe thin-film systems are presented.•The studied samples were obtained by using the spin-coating method.•The thickness of Fe and PDP layers were varied from 14 to 50 nm and from 10 to 35 nm, respectively.•The studied samples are characterized by two-step hysteresis loops. Electrically conductive polymers, created at the end of XX century, attract the attention of researchers due to variety of their mechanical and optical properties, as well as high conductivity. Studies conducted to date show the ability of a polymer to transition from low conductivity to a highly conducting state that is close to metallic and has a strong anisotropy. Due to the above properties, they are widely used as functional elements in devices of microelectronics. At the same time, the magnetic characteristics and behaviour features in magnetic field of polymers, in particular, poly diphenylene phthalide (PDP), have not been studied practically. The present work is devoted to the results of investigation of the magnetic properties of Fe/PDP/Fe thin-film systems.