Carbonaceous magnetic nanocomposites*

Ferromagnetic nanoparticles when in proximity to low-dimension carbonaceous structures, such as 1D carbon nanotubes and 2D graphene, induce ferromagnetism in the latter through spin-orbit coupling and exchange interaction. Taking advantage of these interaction, we have created carbonaceous magnetic nanocomposites using carbon nanotubes and multilayer graphene that exhibit enhanced magnetic properties compared to the pristine nanoparticles [1-3]. The Magnetic nanoparticles studied included Fe, Fe2O3, Fe3O4, Co3O4, and CoFe2O4 on both carbon nanotubes and multilayered graphene. Structural and magnetic studies showed that magnetic enhancement occurred by proximity effect.


1- D. Seifu, L. Giri, H. Hong, G. Mallick, S.P. Karna, M.S. Seehra, Nanotechnology (IEEE-NANO), 2016 IEEE 16th International Conference on, IEEE, 2016, pp. 587-590.
2- D. Seifu, S. Neupane, L. Giri, S.P. Karna, H. Hong, M. Seehra, Applied Physics Letters, 106 (2015) 212401.
3- D. Seifu, G. Mallick, S.P. Karna, Nanomagnetics-magnetic Nanoparticles Filled Carbon Nanotubes, Army Research Laboratory 2012.