Research output: Contribution to journal › Journal article
|Journal publication date||06/2013|
|Journal||Journal of Low Temperature Physics|
|Number of pages||7|
We present measurements of the force-velocity response of a vibrating wire resonator in superfluid He-3-B at very low temperatures. At low velocities the response is dominated by intrinsic (vacuum) damping whilst at high velocities it is dominated by pair-breaking. At intermediate velocities there is a series of small plateaus where the velocity often shows small oscillations. We believe that the behaviour results from the stretching of vortices pinned to the wire. The vortices grow and self-reconnect, emitting a vortex ring. The behaviour is very sensitive to the presence of surrounding vortices generated by a neighbouring vibrating wire.