Ferromagnetic resonance study of the non-stoichiometric double perovskite Sr2Fe1+<italic>x</italic>Mo1−<italic>x</italic>O6.

In this work we report a ferromagnetic resonance study on the magnetic properties of double perovskite compounds fab-ricated by solid state reaction. Based on a mean field approach, along with morphological considerations, we accurately determined the saturation magnetization of the non-stoichiometric double perovskite Sr₂Fe_{1+<italic>x</italic>}Mo_{1−<italic>x</italic>}O₆. Our approach has revealed a direct in-fluence of composition on the overall magnetic behavior of these materials, providing complementary experimental evidence that corroborates previous theoretical findings. The understanding of the influence of composition is of paramount importance for the design of ferromagnetic oxides with tunable magnetic and magneto-transport behavior. [ABSTRACT FROM AUTHOR]