Comparison of Structural, dielectric and magnetic investigation of Cr3+ substituted Mg-Cu, Mg-Zn, and Mg-Ni ferrites system

•Studied the effect of Cr3+ substitution on the structural, dielectric, and magnetic properties of Mg0.5M0.5Fe1.5Cr0.5O4 (M = Cu, Zn, and Ni) ferrite system prepared by sol–gel method.•The XRD patterns showed a single spinel phase.•The magnetic saturation (Ms), magnetic moment (Mr), and Coercivity (Hc) is found to be the highest for the Cr substituted Mg-Ni ferrite system.•All the synthesized samples showed ferrimagnetic behavior.•Thus, the magnetic and structural properties of (Mg0.5M0.5Fe1.5Cr0.5O4 (M = Cu, Zn, and Ni) NPs can be favorable for their potential use in high-density recording media applications.