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

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          Abstract

          Structural and energy characteristics of the smallest magnetic endofullerene Fe@C20 have been calculated using the density functional theory approach. The ground state of Fe@C20 is found to be a septet state, and the magnetic moment of 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 the semiempirical approach. The scheme of a magnetic nanorelay based on cantilevered nanotubes filled with magnetic endofullerenes is elaborated. The proposed nanorelay is turned on as a result of bending of nanotubes by a magnetic force. Operational characteristics of such a nanorelay based on (8,8) and (21,21) nanotubes fully filled with Fe@C20 are estimated and compared to the ones of a nanorelay made of a (21,21) nanotube fully filled with experimentally observed (Ho3N)@C80 with the magnetic moment of 21 Bohr magnetons. Room temperature operation of (21,21) nanotube based nanorelays is shown.

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          Exceptionally high Young's modulus observed for individual carbon nanotubes

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            Carbon nanotube-based nonvolatile random access memory for molecular computing

            A concept for molecular electronics exploiting carbon nanotubes as both molecular device elements and molecular wires for reading and writing information was developed. Each device element is based on a suspended, crossed nanotube geometry that leads to bistable, electrostatically switchable ON/OFF states. The device elements are naturally addressable in large arrays by the carbon nanotube molecular wires making up the devices. These reversible, bistable device elements could be used to construct nonvolatile random access memory and logic function tables at an integration level approaching 10(12) elements per square centimeter and an element operation frequency in excess of 100 gigahertz. The viability of this concept is demonstrated by detailed calculations and by the experimental realization of a reversible, bistable nanotube-based bit.
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              Carbon nanotubes, buckyballs, ropes, and a universal graphitic potential

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                Author and article information

                Journal
                24 April 2010
                Article
                10.1117/1.3417104
                1004.4289
                e1e1a504-3ec4-4772-84b7-3c3a28565f31

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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                Custom metadata
                J. Nanophotonics, 4 (2010) 041675 (18pp)
                18 pages, 9 figures
                cond-mat.mes-hall

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