Sol gel and ceramic synthesis of Sr2FeMo1?xWxO6 (0 ≤ x ≤ 1) double perovskites series

摘要

Preparation methods (ceramic and sol–gel methods) using reducing conditions were optimized for the formation of phase pure double perovskites of Sr _(2) FeMo _((1? x )) W _( x ) O _(6) (0 ≤ x ≤ 1) showing enhanced homogeneity and cation ordering for investigating magnetic properties. X-ray diffraction (XRD) revealed a structural transition from tetragonal to monoclinic as W replaces Mo ( x = 0.5–0.6). The SQUID magnetometry confirmed a ferrimagnetic ground state for Sr _(2) FeMoO _(6) whereas Sr _(2) FeWO _(6) shows an antiferromagnetic state. Current results demonstrate that improved preparation methods can enhance the saturation magnetization.