  Buckminsterfullerene (C60) can exhibit ferromagnetism at the interface
(called as a spinterface) when it is placed next to a ferromagnet (FM).
Formation of such spinterface happens due to orbital hybridization and spin
polarized charge transfer at the interface. The spinterface can influence the
domain size and dynamics of the organic/ferromagnetic heterostructure. Here, we
have performed magnetic domain imaging and studied the relaxation dynamics in
Pt/Co/C60/Pt system with perpendicular anisotropy. We have compared the results
with its parent Pt/Co/Pt system. It is observed that presence of C60 in the
Pt/Co/Pt system increases the anisotropy and a decrease in the bubble domain
size. Further the switching time of Pt/Co/C60/Pt system is almost two times
faster than Pt/Co/Pt system. We have also performed the spin polarized density
functional theory (DFT) calculations to understand the underneath mechanism.
DFT results show formation of a spin polarized spinterface which leads to an
enhancement in anisotropy.
