Mechanically Activated Synthesis and Magnetoresistance of Nanocrystalline Double Perovskite Sr2FeMoO6

• Published in: Journal of the American Ceramic Society Vol. 88; no. 9; pp. 2635 - 2638
• Main Authors: Li, Chen, Cailei, Yuan, Junmin, Xue, Wang, John
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Science Inc 01.09.2005; Blackwell
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Magnetic properties and materials; Magnetic properties of nanostructures; Materials science; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Physics; Inorganic compounds; Magnetization; Transition element compounds; Polycrystals; Oxides; Perovskites; Experimental study; Mechanical activation; Iron Molybdenum Strontium Oxides Mixed; Strontium oxides; Molybdenum oxides; Iron oxides; Magnetoresistance; Chemical synthesis; Nanocrystal; Mechanochemistry; Magnetic properties
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1551-2916.2005.00473.x

Nanocrystalline Sr2FeMoO6 (SFMO) of double perovskite structure has been successfully synthesized by mechanical activation (MA) in air using SrO, Fe2O3, and MoO2 as the starting materials. Magnetization of the polycrystalline SFMO derived from MA increases with increasing MA time. Similarly, the magnetoresistance (MR) effect also increases with increasing MA time up to 25 h, which is ascribed to the elimination of SrMoO4 impurity phase and the refinement in grain size of the polycrystalline double perovskite phase. Prolonged MA adversely affects the MR effect, where Fe contamination was evidenced.