Bismuth-induced dielectric relaxation in the (1-x)La(Mg1/2Ti1/2)O3-xBi(Mg1/2Ti1/2)O3 perovskite system - Salak, AN; Ferreira, VM; Ribeiro, JL; Vieira, LG; Pullar, RC; Alford, NM (JOURNAL OF APPLIED PHYSICS, 2008)