“…In the composition range 1<x<2, for particles with sizes around 30 nm, Ms values lower than the bulk one were attributed to the existence of a structural "dead" surface layer, due to the formation of small nanoscale crystallite and residual strains during the sample synthesis [47]. The high saturation magnetization values in this study ( [51]. According to the literature, the decrease in Ms in our study is mainly due to a size effect, the structural disorder at the surface of the particles being relatively more important for small particles.…”