Magnetic characterization of Nd0.8Sr0.2(Mn1−xCox)O3 perovskites

Abstract We present a magnetic study of the family of perovskites Nd 0.8 Sr 0.2 (Mn 1− x Co x )O 3 ( x =0.1, 0.2 and 0.3). These compositions have been prepared by using both the sol–gel method and the freeze-drying technique. As a result, we have obtained polycrystalline powder-like samples. We have obtained pure compounds that have been indexed in the Pnma space group. The study of their magnetic properties shows a decrease of the measured low-temperature magnetic moment as the content of Co increases in the composition. However, a similar magnetic ordering temperature of about 130 K has been determined for all samples. All the studied compounds show insulating behaviour of the electrical resistivity.