Neutron scattering study of PbMg1/3Ta2/3O3 and BaMg1/3Ta2/3O3 complex perovskites S. N. Gvasaliya, B. Roessli, D. Sheptyakov, S. G. Lushnikov and T. A. Shaplygina Eur. Phys. J. B, 40 3 (2004) 235-241 Published online: 09 September 2004 DOI: 10.1140/epjb/e2004-00276-8