  During the last years great attention has been given to the encapsulation of
magnetic nanoparticles. In this work we investigated the stability of small
magnetic particles inside magnetic nanotubes. Multisegmented nanotubes were
tested in order to optimize the stability of the particle inside the nanotubes.
Our results evidenced that multisegmented nanotubes are more efficient to
entrap the particles at temperatures up to hundreds of kelvins.
