Electrical and Structural Characterization of Ba(Y, Ta)$_{\mathrm{x}}$ Ti$_{\mathrm{1-2x}}$O$_{3}$ With x $=$ 0.025 and 0.05

Ba(Y, Ta)$_{\mathrm{x}}$ Ti$_{\mathrm{1-2x}}$O$_{3}$, with x $=$ 0.025 and 0.05, is investigated through temperature dependent electrical and structural characterization. The material is electrically characterized from 10Hz to 2 MHz for dielectric constant, tunability, dissipation factor and figure of merit over the temperature range -50 $^{\circ}$C to 125 $^{\circ}$C. In addition, lattice parameters and structural changes of the material are reported as a function of temperature as obtained using x-ray diffraction and Rietveld refinement. Properties of these electric-field tunable materials are discussed in terms of ferroelectrics, non-relaxor versus relaxor behavior, and a ferroelectric dipole-like glass state.