1.Institute of Physics,St. Petersburg State University,Peterhof, St. Petersburg,Russia;2.Institute for High Energy Densities, Joint Institute for High Temperatures,Russian Academy of Sciences,Moscow,Russia
Abstract:
The rotational dynamics of single dust grains in a weak magnetic field is investigated on a kinetic level. Experiments reveal
spin-up of spherical dust grains and alignment of their magnetic moments parallel to the magnetic induction vector. The angular
velocity of spinning prolate grains varies as magnetic induction increases to 250 G. Spinning dust grains are found to flip
over only when the magnetic field magnitude is changing. The results demonstrate that dusty plasma has paramagnetic properties.
Qualitative interpretations are proposed to explain newly discovered phenomena.