Structural, magnetic, and transport properties of Sr2Fe(1+x)Mo(1-x)O6

Abstract

In this study, the double perovskite oxide Sr2Fe(1+x)Mo(1-x)O6 (x = 0.00, 0.01, 0.03) was prepared by the sol-gel method, and the effects of Fe ion doping on its structural, magnetic, and transport properties were studied. X-ray diffraction (XRD) results show that the samples obtained were in the pure phase, and the disorder of Fe/Mo was 11.07%, 10.78%, and 10.47% for the samples with x = 0.00, 0.01, and 0.03, respectively. Based on observing the microstructure of the samples and calculations using a particle size analysis software, the particle sizes were 0.77, 1.00, and 0.87 μm for the samples with x = 0.00, 0.01, and 0.03, respectively. The MR–H curves at 5 K and 300 K were tested with an applied magnetic field of −9 T–9 T. At 5 K, the saturation magnetic moments of the samples with x = 0.00, 0.01, and 0.03, calculated from magnetization curves, were 3.16, 2.69, and 2.71 μB/f.u., and the coercive fields were 63.94, 71.85, and 94.41 Oe, respectively. This shows that Fe ion doping reduces the saturation magnetic moment and increases the coercive field.