Crystal structure and magnetic properties of Sr2Ni1-xMgxMoO6 (x = 0, 0.25, 0.5, and 0.75) polycrystals

Abstract Sr2Ni1-xMgxMoO6 double perovskites were synthesized by pyrolysis of glycerol–salt mixtures and their vibrational phonon modes were investigated using optical spectroscopic techniques. X-ray diffraction and Raman spectroscopy were employed to investigate crystal structures of these perovskite materials and purity of the samples. The magnetic ground state of Sr2Ni1-xMgxMoO6 has been characterized using magnetic susceptibility measurements indicating that Sr2Ni0.75Mg0.25MoO6 orders in an antiferromagnetic state at about 56 K while Sr2Ni0.5Mg0.5MoO6 and Sr2Ni0.25Mg0.75MoO6 are paramagnetic.