Fyzikální ústav Akademie věd ČR

Existence of magnetic alignment in Carbon nanotubes (CNTs) has been theoretically predicted [1, 2], but the existence of localized magnetic moment on carbon atoms has not been experimentally observed yet. The main complication is the presence of residual metal catalyst, which is used in the preparation of CNTs, thus the removal of catalyst and subsequent approval of CNT purity is essential [3].

The electrical activity of superfluid ⁴He induced by the relative motion of normal and superfluid components has been recently observed. It was induced in two different types of experiments. In a first experiment the electric potential oscillations were generated by a wave of second-sound, the out-of-phase oscillation of the normal and superfluid components. In a second experiment liquid helium was involved in motion by a torsional oscillator whose walls affected the normal component only.  The full text >>