Microstructural, magnetic, electrical transport and large magnetoresistance properties of La0.57Nd0.1Sr0.13 Ag0.2MnO3

This report presents the structural, magnetoresistance (MR) and magneto-electrical properties of Ag substituted La0.57Nd0.1Sr0.13Ag0.2MnO3 compound synthesized by solid state reaction method. To obtain crystallographic parameters, the X-ray diffraction patterns are fitted in R-3c space group with Rietveld refinement method. The resistivity and magneto-transport measurements are performed using standard four-probe assembly with and without magnetic fields. The electrical resistivity was fitted with the phenomenological percolation model, which is based on the phase segregation of ferromagnetic metallic clusters and paramagnetic isolant regions. So, we found that the estimated results are in adequate accordance with experimental data. The obtained values of the temperature coefficient of resistance (TCR) for La0.57Nd0.1Sr0.13Ag0.2MnO3 sample are comparable with some systems used for infrared sensors. The Large MR of La0.57Nd0.1Sr0.13 Ag0.2MnO3 is suitable for utilization in electronic instruments such as computer hard discs, high field magnetic sensors, and memory devices.