  We address an experimental observation of shear flow of micron sized dust
particles in a strongly coupled complex plasma in presence of a homogeneous
magnetic field. Two concentric Aluminum rings of different size are placed on
the lower electrode of a radio frequency (rf) parallel plate discharge. The
modified local sheath electric field is pointing outward/inward close to the
inner/outher ring, respectively. The microparticles, confined by the rings and
subject to an ion wind that driven by the local sheath electric field and
deflected by an externally applied magnetic field, start flowing in azimuthal
direction. Depending upon the rf amplitudes on the electrodes, the dust layers
show rotation in opposite direction at the edges of the ring-shaped cloud
resulting a strong shear in its center. MD simulations shows a good agreement
with the experimental results.
