Magnetic fullerenes inside single-wall carbon nanotubes

Simon, F.; Kuzmany, H.; Nafradi, B.; Feher, T.; Forro, L.; Fulop, F.; Janossy, A.; Korecz, L.; Rockenbauer, A.; Hauke, F.; Hirsch, A.

Magnetic fullerenes inside single-wall carbon nanotubes

Authors

Description

C59N magnetic fullerenes were formed inside single-wall carbon nanotubes by vacuum annealing functionalized C59N molecules encapsulated inside the tubes. A hindered, anisotropic rotation of C59N was deduced from the temperature dependence of the electron spin resonance spectra near room temperature. Shortening of spin-lattice relaxation time, T_1, of C59N indicates a reversible charge transfer toward the host nanotubes above $\sim 350$ K. Bound C59N-C60 heterodimers are formed at lower temperatures when C60 is co-encapsulated with the functionalized C59N. In the 10-300 K range, T_1 of the heterodimer shows a relaxation dominated by the conduction electrons on the nanotubes.