Magnetic properties of Sr_2Fe_(1-x)Ni_xMoO_6 perovskites

摘要

The magnetic properties of Sr_2Fe_(1-x)Ni_xMoO_6 perovskites, with x ≤ 0.2, in a large temperature range, are reported. The saturation magnetizations decrease, while the Curie temperatures increase, as the nickel content is higher. These trends are correlated with the distribution of magnetic ions in B and B' sites. The reciprocal susceptibilities follow non linear temperature dependences. The magnetic properties are analysed assuming a two sublattices model, in the mean field approximation.