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Mechanically Activated Synthesis and Magnetoresistance of Nanocrystalline Double Perovskite Sr 2 FeMoO 6
Author(s) -
Li Chen,
Cailei Yuan,
Junmin Xue,
Wang John
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00473.x
Subject(s) - nanocrystalline material , crystallite , magnetoresistance , perovskite (structure) , materials science , impurity , magnetization , phase (matter) , grain size , chemical engineering , mineralogy , metallurgy , crystallography , chemistry , nanotechnology , magnetic field , physics , organic chemistry , quantum mechanics , engineering
Nanocrystalline Sr 2 FeMoO 6 (SFMO) of double perovskite structure has been successfully synthesized by mechanical activation (MA) in air using SrO, Fe 2 O 3 , and MoO 2 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 SrMoO 4 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.