Dielectric relaxation behavior in La_1.80Y_0.20NiMnO₆ double pervoskite

Among multifunctional La₂BB’O₆ (B/B’ are transition metals) double perovskites, La₂NiMnO₆ has recently received significant attention due to its rich physics and prospects in technological applications. In the present study, La_1.80Y_0.20NiMnO₆ was synthesized using sol-gel method. Le Bail profile analysis of room temperature X-ray diffraction data emphasized on the formation of single phase monoclinic (P2₁/n) La_1.80Y_0.20NiMnO₆ ceramics. Temperature dependent dielectric spectroscopy shows relaxor-like behavior with giant dielectricity of the order of ∼10⁴.