Structure and dielectric characterization of the La(Mg1/2Ti1/2)O3-Nd(Mg1/2Ti1/2)O3 system

(1-x)La(Mg1/2Ti1/2)O-3-xNd(Mg1/2Ti1/2)O-3 [0 less than or equal to x less than or equal to 1] ceramics were prepared from powders obtained by a non-conventional chemical route based on the Pechini method. La(Mg1/2Ti1/2)O-3 and Nd(Mg1/2Ti1/2)O-3 were found to form perovskite solid solutions in the whole compositional range. The structure of all the compositions was refined using the P2(1)/n space group, which allows account of B-site ordering. The relative permittivity and temperature coefficient of the resonant frequency measured in the gigahertz range were analysed with respect to composition of the system. The non-monotonic dependence of the microwave quality factor on x was described qualitatively with the damped classical oscillator model and assuming 'two-mode' behaviour of the A <----> BO6 vibration mode in the solid solutions.