## Dielectric properties and lattice dynamics of Ca-doped K _{0.95}Li _{0.05}TaO _{3}; KLT(5):Ca

Relaxor behavior and lattice dynamics have been studied by employing dielectric measurements and neutron-scattering methods for a single crystal of K{sub 1-x}Li{sub x}TaO{sub 3} (x=0.05), where a small amount of a Ca impurity ({approx}15 ppm) was incorporated during the single-crystal growth procedure. The dielectric constant {epsilon}({omega},T) shows qualitatively similar behavior to that of Ca-free KLT with x=0.043 with both compositions exhibiting relaxational properties with no evidence for a ferroelectric transition. The absolute value of {epsilon}({omega},T=0) for the present crystal is larger by an order of magnitude than that of the Ca-free sample due to charge carriers induced by the Camore »