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Structural and energy characteristics of the smallest magnetic endofullereneFe@C20 have been calculated using the density functional theory approach. Theground state of Fe@C20 is found to be a septet state, and the magnetic momentof Fe@C20 is estimated to be 8 Bohr magnetons. Characteristics of an (8,8)carbon nanotube with a single Fe@C20 inside are studied in the framework of thesemiempirical approach. The scheme of a magnetic nanorelay based oncantilevered nanotubes filled with magnetic endofullerenes is elaborated. Theproposed nanorelay is turned on as a result of bending of nanotubes by amagnetic force. Operational characteristics of such a nanorelay based on (8,8)and (21,21) nanotubes fully filled with Fe@C20 are estimated and compared tothe ones of a nanorelay made of a (21,21) nanotube fully filled withexperimentally observed (Ho3N)@C80 with the magnetic moment of 21 Bohrmagnetons. Room temperature operation of (21,21) nanotube based nanorelays isshown.

Magnetically operated nanorelay based on two single-walled carbon nanotubes filled with endofullerenes Fe@C20