Structural, magnetic and dielectric properties of cobalt doped GdFeO3 orthoferrites

In this present work deals with the structural and magnetoelectric behaviour of Cobalt substituted GdFeO3 orthoferrites synthesized by solid state reaction technique. X-ray diffraction and FTIR studies of GdCoxFe1-xO3 (0 ≤ x ≤ 0.3) orthoferrites disclosed the orthorhombic Pbnm structure and Co induced vibrational modes in GdFeO3 orthoferrites respectively. Cationic displacements confirmed from the crystallite size calculations and deviations in lattice parameters affected the magnetic and electrical nature of the GdCoxFe1-xO3 (0 ≤ x ≤ 0.3) orthoferrites. Co substitution promoted a drastic improvement in the magnetic nature of Cobalt substituted GdFeO3 orthoferrites than that of GdFeO3. Antiferromagnetic GdFeO3 has turned out to be strong ferromagnetic material on Co substitution. Higher coercive values 1620.4 Oe and 4035.06 Oe were recorded for GdCo0.2Fe0.8O3 ferrites whereas for GdFeO3 they were seen to be 527.62 Oe and 360.61 Oe at 300K and 150K temperatures respectively. Dielectric studies revealed a decrease in dielectric constant and loss tangent values with frequency at room temperature. AC conductivity is seen to be increasing at higher frequencies and a maximum value is obtained at Co content of x = 0.2. The significance of cobalt in mutating the structural, magnetic and electrical properties of GdCoxFe1−xO3 (0 ≤ x ≤ 0.3) ferrites is clearly seen by making them useful for high frequency applications.