Spontaneous symmetry breaking of a ferromagnetic superfluid in a gradient fieldT. Vanderbruggen, Silvana Palacios Álvarez, S. Coop, N. Martinez de Escobar and M. W. MitchellEPL, 111 6 (2015) 66001DOI: https://doi.org/10.1209/0295-5075/111/66001