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The magnetic, grain morphology and dielectric properties of synthesized Sr 2 MnNiFe 12 O 22 + xY 2 O 3 (x = 0 -5 wt.%) ferrite have been investigated via X-ray diffraction (XRD), scanning electron microscopy (SEM) and dielectric spectroscopy, respectively. The nanostructure governs increase in inter-grain connectivity with substitution. The appearance of broad peaks in imaginary electric modulus plots (Mʺ) show the existence of relaxation process in all these samples. The grain boundarydoi:10.13168/cs.2016.0005 fatcat:golqzrvgcve6rdz4pdipoxq4gm