Synthesis and characterization of Ruddlesden–Popper Oxides Nd1+xSr2−xMnCrO7 (x=0.0, 0.2 and 0.4)

Abstract

In this work, we report the structural, magnetic and electrical properties of Ruddlesden–Popper Oxides Nd1+xSr2−xMnCrO7 (x=0.0, 0.2 and 0.4). Our polycrystalline samples have been synthesized using a citrate-gel method. Magnetization measurements versus temperature in a magnetic applied field of 1000G showed that all our investigated samples display a paramagnetic–ferromagnetic transition with decreasing temperature. With increasing x the paramagnetic–ferromagnetic transition first shifts to lower temperature and then to higher temperature. The results of resistivity measurements show that adiabatic small polaron hopping model is probably responsible for electrical conduction in these polycrystalline materials.