Dielectric, ferroelectric and electrocaloric properties of 1%Eu - doped BaZryTi1-yO3 ceramics

•1%Eu – BaZryTi1–0.0025-yO3 ceramics with compositions y = 0, 0.05, 0.15, and 0.30 prepared by solid-state reaction.•The ceramic sample with y = 0.15 reaches a maximum in dc-tunability (nr = 85%).•The temperature dependence of the electrocaloric effect was tested by an indirect method.•The maximum change in temperature was ΔT=1.13 K for y = 0.•The ceramic with y = 0.15 has a constant value of ΔT=0.40 K for a broad temperature range, from room temperature up to 350 K.