Sr doping effect on micro structural, transport and magnetic properties in Pr_(1-x)Sr_xMnO_3 (0.2 ≤ x≤ 0.4) nanomanganite

摘要

In this article, microstructural, magnetic, magneto-transport, electronic transport properties of Pr_(1-x)Sr_xMnO_3 system have been systematically studied in nanometric dimension over the range 0.2 ≤ x ≤ 0.4 by preparing the compound through pyrophoric reaction route. XRD diffraction measurements indicate that all the samples are in orthorhombic Pbnm space group. Electronic and magneto-transport properties of these materials have been thoroughly investigated in nanometric grain size modulation. These Sr doped compounds at x=0.3 exhibit more ferromagnetic metallic behavior at zero field and negative magneto resistance in low temperature. The different magnetic phase was found using ac magnetic susceptibility measurement. Magneto -transport nature is explained using spin polarization tunneling model.