Effect of oxygen substitution by nitrogen on magnetic and transport properties in Sr2FeMoO6 compound

The result of Fullprof_suite refinement shows that the structure of Sr2FeMo(O0.889N0.111)(6) is assigned to tetragonal system with space group I4/m and its cell parameters are a = 0.559250(8) nm and c = 0.789842(19) nm. The M-T curve demonstrates the magnetic transition temperature being over 300 K. Isothermal magnetization shows that the saturation and spontaneous magnetization are 1.29 and 0.87 mu(B)/fu at 300 K, respectively. The sample shows a large magnoresistance in a 0.5 T magnetic field. The electrical transport behavior in the temperature range from 108 to 274 K is dominated by electron-phonon scattering under a zero magnetic field. However, under a magnetic field of 0.5 T the electron electron and electron-magnon scattering control electrical transport behavior in the temperature range from 145 to 267 K and electrical transport property is governed by electron phonon scattering in the temperature region of 97-130 K. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.