Magnetic dispersion in a soft amorphous layer with a helical anisotropy profileM. Gloanec, S. Dubourg, O. Acher, F. Duverger, D. Plessis and A. Bonneau-BraultEPJ Web of Conferences, 40 (2013) 13003DOI: https://doi.org/10.1051/epjconf/20134013003