Magnetism in photopolymerized fullerenes

Carbon 41, 1575 (2003)

T. L. Makarova, K. -H. Han, P. Esquinazi, R. R. da Silva, Y. Kopelevich, I. B. Zakharova and B. Sundqvist

Abstract

The phototransformation of bulk C60 and laser- and electron-beam treatment of C60 films in air changes their magnetic properties. Nonlinear magnetization is observed only for samples irradiated in the presence of oxygen, while, in the case of pressure-polymerized C60, oxygen adversely affects the magnetic properties. The contrasting roles of oxygen in these processes are discussed. Magnetic force microscopy shows that laser- and electron-beam irradiation of fullerene films produces magnetic images which are highly correlated with the topographic images.