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, La1.80Y0.20NiMnO6 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) La1.80Y0.20NiMnO6 ceramics. Temperature dependent dielectric spectroscopy shows relaxor-like behavior with giant dielectricity of the order of ∼104.

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