Magnetization of a half-quantum vortex in a spinor Bose-Einstein   condensate
  Magnetization dynamics of a half-quantum vortex in a spin-1 Bose-Einstein condensate with a ferromagnetic interaction are investigated by mean-field and Bogoliubov analyses. The transverse magnetization is shown to break the axisymmetry and form threefold domains. This phenomenon originates from the topological structure of the half-quantum vortex and spin conservation. 
Shoichi Hoshi and Hiroki Saito