Neutron scattering study of PbMg1/3Ta2/3O3 and BaMg1/3Ta2/3O3 complex perovskitesS. N. Gvasaliya, B. Roessli, D. Sheptyakov, S. G. Lushnikov and T. A. ShaplyginaEur. Phys. J. B, 40 3 (2004) 235-241DOI: https://doi.org/10.1140/epjb/e2004-00276-8