Decrement of magnetic spin effect in films of polymer composites with rubrene: Interaction of excited states with magnetic nanoparticles

Resumo

For films of poly(alkane etherimide) composites containing rubrene microcrystals, the effect of Cu–Ni magnetic nanoparticles (MNP) with a reduced Curie temperature T_C (40–60°C) on luminescence and photoconductivity, as well as on the magnetic spin effect, has been observed and studied. It has been shown that this effect depends on the excitation intensity and weak heating (up to T < T_C°C). The assumption has been made that the excited states of the microcrystals (or charge carriers) interact with the MNP surface, leading to a change in their magnetic characteristics.