Possible Room Temperature Ferromagnetism in Hydrogenated Carbon Nanotubes

Details Possible Room Temperature Ferromagnetism in Hydrogenated Carbon Nanotubes Possible Room Temperature Ferromagnetism in Hydrogenated Carbon Nanotubes

2010-01-28

arxiv.org/abs/1001.5204v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages with 3 figures included; Accepted by Phys. Rev. B

Scientific paper

We find that ferromagnetism can be induced in carbon nanotubes (CNTs) by introducing hydrogen. Multiwalled CNTs grown inside porous alumina templates contain a large density of defects resulting in significant hydrogen uptake when annealed at high temperatures. This hydrogen incorporation produces H-complex and adatom magnetism which generates a sizeable ferromagnetic moment and a Curie temperature near Tc=1000 K. We studied the conditions for the incorporation of hydrogen, the temperature-dependent magnetic behavior, and the dependence of the ferromagnetism on the size of the nanotubes.

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