Ferromagnetism in nanotubes controlled by electron/hole doping

摘要

In 'spintronics' (the spin-based electronics), one of the key processes is spin polarization in nonmagnetic semiconductors. One approach to achieve this is through the injection of spin-polarized electrons or holes from magnetic materials [1], and in doing so to induce magnetization-related changes in electrical resistivity. Spintronics requires fabrication of magnetic nanostructures, therefore the use of nanotubes or nanowires [2,3] ferromagnetic at room-temperature would be very attractive, for they could be potentially integrated in nanowire-based heterostructures [4].