Effect of B-site vanadium (V) doping on the structural, magnetic and magnetocaloric properties of Ba2FeMo1-xVxO6 perovskite

Abstract The effects of B-site Vanadium (V) doping on the structural, magnetic and magnetocaloric properties of double perovskite compound Ba2FeMoO6 were investigated. The Ba2FeMo1-xVxO6 (0.0 ≤ x ≤ 0.4) samples were synthesized using the conventional solid state reaction method and were observed to crystallize in the cubic phase with space group Fm-3m using the X-ray diffraction pattern of the material. The temperature dependent as well as the isothermal magnetization data confirmed the ferromagnetic behavior of the samples. The second order magnetic phase transition of all the samples were established using the Arrott plots analysis. The highest spontaneous magnetization was found to be 34.76 emu/g at 100 K with a sharp magnetic transition behavior near transition temperature (TC) = 315 K for pristine Ba2FeMoO6 (BFMO) sample. TC approached near room temperature (≈300 K) followed by a reduction in the spontaneous magnetization values on the partial substitution of Mo with V. Our findings in this work suggest that the magnetic and magnetocaloric behavior of the double perovskite Ba2FeMoO6 can be tailored through the controlled partial substitution at B-site. The B-site doping in these perovskite compounds can effectively tune the physical properties and the technological potential in numerous fields can be foreseen.