Abstract
The homogeneously precessing domain (HPD) is a coherent dynamic order parameter state of 3He-B, which originates from the stiffness of the spin part of the order parameter. We have investigated the HPD state in the presence of vortex-free counterflow as a function of the rotation velocity ω. The energy difference between the orbital textures across the domain boundary leads to a shift of the boundary, such that the precessing domain shrinks ∝ω 2. In the equilibrium vortex state no such shift is observed. By monitoring the shift vs ω we have studied the B phase superfluid density anisotropy in a magnetic field, the nucleation of quantized vortex lines at the side wall of the rotating container, and the spatial distribution of counterflow and vortices, when the number of vortices is less than in equilibrium.
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