Ferromagnetic properties of charged vector bosons condensate in the   early universe
  Bose-Einstein condensation in the early universe is considered. The magnetic properties of a condensate of charged vector bosons are studied, showing that a ferromagnetic state is formed. As a consequence, the primeval plasma may be spontaneously magnetized inside macroscopically large domains and primordial magnetic fields can be generated. 
Gabriella Piccinelli
astro-ph.CO hep-ph